# This is my pillow

...will you help me immortalize it?

I've had this pillow a few years now, and apparently it's time to get rid of it. Can you please write a function or program, that I can bring with me and use to recreate this pillow whenever I want to reminisce a bit.

It must work with no input arguments.

The output should look exactly like this (trailing newlines and spaces are OK).

/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////


This is code golf, so the shortest code in bytes win!

var QUESTION_ID=98701,OVERRIDE_USER=31516;function answersUrl(e){return"https://api.stackexchange.com/2.2/questions/"+QUESTION_ID+"/answers?page="+e+"&pagesize=100&order=desc&sort=creation&site=codegolf&filter="+ANSWER_FILTER}function commentUrl(e,s){return"https://api.stackexchange.com/2.2/answers/"+s.join(";")+"/comments?page="+e+"&pagesize=100&order=desc&sort=creation&site=codegolf&filter="+COMMENT_FILTER}function getAnswers(){jQuery.ajax({url:answersUrl(answer_page++),method:"get",dataType:"jsonp",crossDomain:!0,success:function(e){answers.push.apply(answers,e.items),answers_hash=[],answer_ids=[],e.items.forEach(function(e){e.comments=[];var s=+e.share_link.match(/\d+/);answer_ids.push(s),answers_hash[s]=e}),e.has_more||(more_answers=!1),comment_page=1,getComments()}})}function getComments(){jQuery.ajax({url:commentUrl(comment_page++,answer_ids),method:"get",dataType:"jsonp",crossDomain:!0,success:function(e){e.items.forEach(function(e){e.owner.user_id===OVERRIDE_USER&&answers_hash[e.post_id].comments.push(e)}),e.has_more?getComments():more_answers?getAnswers():process()}})}function getAuthorName(e){return e.owner.display_name}function process(){var e=[];answers.forEach(function(s){var r=s.body;s.comments.forEach(function(e){OVERRIDE_REG.test(e.body)&&(r="<h1>"+e.body.replace(OVERRIDE_REG,"")+"</h1>")});var a=r.match(SCORE_REG);a&&e.push({user:getAuthorName(s),size:+a[2],language:a[1],link:s.share_link})}),e.sort(function(e,s){var r=e.size,a=s.size;return r-a});var s={},r=1,a=null,n=1;e.forEach(function(e){e.size!=a&&(n=r),a=e.size,++r;var t=jQuery("#answer-template").html();t=t.replace("{{PLACE}}",n+".").replace("{{NAME}}",e.user).replace("{{LANGUAGE}}",e.language).replace("{{SIZE}}",e.size).replace("{{LINK}}",e.link),t=jQuery(t),jQuery("#answers").append(t);var o=e.language;/<a/.test(o)&&(o=jQuery(o).text()),s[o]=s[o]||{lang:e.language,user:e.user,size:e.size,link:e.link}});var t=[];for(var o in s)s.hasOwnProperty(o)&&t.push(s[o]);t.sort(function(e,s){return e.lang>s.lang?1:e.lang<s.lang?-1:0});for(var c=0;c<t.length;++c){var i=jQuery("#language-template").html(),o=t[c];i=i.replace("{{LANGUAGE}}",o.lang).replace("{{NAME}}",o.user).replace("{{SIZE}}",o.size).replace("{{LINK}}",o.link),i=jQuery(i),jQuery("#languages").append(i)}}var ANSWER_FILTER="!t)IWYnsLAZle2tQ3KqrVveCRJfxcRLe",COMMENT_FILTER="!)Q2B_A2kjfAiU78X(md6BoYk",answers=[],answers_hash,answer_ids,answer_page=1,more_answers=!0,comment_page;getAnswers();var SCORE_REG=/<h\d>\s*([^\n,]*[^\s,]),.*?(\d+)(?=[^\n\d<>]*(?:<(?:s>[^\n<>]*<\/s>|[^\n<>]+>)[^\n\d<>]*)*<\/h\d>)/,OVERRIDE_REG=/^Override\s*header:\s*/i;
body{text-align:left!important}#answer-list,#language-list{padding:10px;width:290px;float:left}table thead{font-weight:700}table td{padding:5px}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <link rel="stylesheet" type="text/css" href="//cdn.sstatic.net/codegolf/all.css?v=83c949450c8b"> <div id="answer-list"> <h2>Leaderboard</h2> <table class="answer-list"> <thead> <tr><td></td><td>Author</td><td>Language</td><td>Size</td></tr></thead> <tbody id="answers"> </tbody> </table> </div><div id="language-list"> <h2>Winners by Language</h2> <table class="language-list"> <thead> <tr><td>Language</td><td>User</td><td>Score</td></tr></thead> <tbody id="languages"> </tbody> </table> </div><table style="display: none"> <tbody id="answer-template"> <tr><td>{{PLACE}}</td><td>{{NAME}}</td><td>{{LANGUAGE}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table> <table style="display: none"> <tbody id="language-template"> <tr><td>{{LANGUAGE}}</td><td>{{NAME}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table>

• I'm somewhat disappointed that the pattern isn't a little more complex, to represent the different line thicknesses of the pillow. – Sparr Nov 6 '16 at 11:29
• @Sparr I tried, but I didn't manage to make it look good using only ASCII characters. Figured this was close enough :) – Stewie Griffin Nov 6 '16 at 11:37
• I'd have just added spaces – Sparr Nov 6 '16 at 20:37
• 'apparently' :P – Pysis Nov 7 '16 at 19:01
• Now you can buy a blank pillow and print the winner snippet on it. – coredump Nov 7 '16 at 19:46

# 05AB1E, 18 15 bytes

Code:

„/\5×{4Å6×»6F=R


Explanation:

„/\               # Push the string "/\"
5×             # Repeat 5 times: "/\/\/\/\/\"
{            # Sort, resulting in: "/////\\\\\"
4Å6         # Create a list of 6's with length 4: [6, 6, 6, 6]
×        # Vectorized string multiplication
»       # Join by newlines
6F     # Do the following six times..
=    #   Print with a newline without popping
R   #   Reverse the string


Uses the CP-1252 encoding. Try it online!

• Wow... two different takes, same byte count... – Oliver Ni Nov 6 '16 at 14:00

# ///, 116 bytes

/a/\\\\\\\\\\\\\\\///b/\\\\\\\\\\\\\\\\//A/aaaaa//B/bbbbb//C/ABABABABABAB
//D/BABABABABABA
/CCCCDDDDCCCCDDDDCCCCDDDD


Try it online!

Edit: the \\\\\\\\\\\\\\\/ and \\\\\\\\\\\\\\\\ are actually a single / and \, respectively.

Edit: -3 because I thought of removing i. I think this can't be further golfed.

## Python 2, 49 bytes

b,a='\/';exec("print(a*5+b*5)*6;"*4+"a,b=b,a;")*6


Thanks to Mitch Schwartz for this clean method that saves a byte. The idea is to print four lines of ('\\'*5+'/'*5)*6, swap the roles of slash and backslash, and then do that whole process 6 times. The two characters are stored in a and b, and swapped as a,b=b,a. The double-loop is double by generating the following code string, then executing it with exec:

print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;


50 bytes:

s='/'*5+'\\'*5;exec("print s*6;"*4+"s=s[::-1];")*6


Makes the line string, prints it four times and then reverses it, then does that 6 times. Does so by generating the following code, then executing it:

print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1]


Here are some of the iterations of my golfing:

for c in([1]*4+[-1]*4)*3:print('/'*5+'\\'*5)[::c]*6

for i in range(24):print('/\\'*5+'\/'*5)[i/4%2::2]*6

for c in range(24):print('\\'*5+'/'*5)[::(c&4)/2-1]*6

for i in range(24):print('/'*5+'\\'*5)[::1-i/4%2*2]*6

for c in([1]*4+[0]*4)*3:print('\/'*5+'/\\'*5)[c::2]*6

for c in([1]*4+[0]*4)*3:print('\/'[c]*5+'/\\'[c]*5)*6

for c in(['/\\']*4+['\/']*4)*3:print(c[0]*5+c[1]*5)*6

for c in([5]*4+[-5]*4)*3:print('/'*c+'\\'*5+'/'*-c)*6

print((('/'*5+'\\'*5)*6+'\n')*4+(('\\'*5+'/'*5)*6+'\n')*4)*3

for x in(['/'*5+'\\'*5]*4+['\\'*5+'/'*5]*4)*3:print x*6

a='/'*5;b='\\'*5
for x in([a+b]*4+[b+a]*4)*3:print x*6

s='/'*5+'\\'*5
for x in([s]*4+[s[::-1]]*4)*3:print x*6

s=('/'*5+'\\'*5)*9
exec("print s[:60];"*4+"s=s[5:];")*6

a='/'*5;b='\\'*5
for i in range(24):print[a+b,b+a][i/4%2]*6


# 05AB1E, 15 bytes

„/\5×{R6×6FR4F=


Try it online!

Explanation:

„/\             # Push "/\"
5×           # Repeat string five times: "/\/\/\/\/\"
{          # Sort: "/////\\\\\"
R         # Reverse: "\\\\\/////
6×       # Repeat string six times
6F     # Repeat the following six times:
R    #   Reverse
4F  #   Repeat the following four times:
= #     Print without popping


Uses the CP-1252 encoding.

## JavaScript (ES6), 6860 58 bytes

A recursive function. Several optimizations inspired from chocochaos answer.

f=(n=1440)=>n--?'/\\'[n/240&1^n/5&1]+(n%60?'':
)+f(n):''


### Demo

f=(n=1440)=>n--?'/\\'[n/240&1^n/5&1]+(n%60?'':
)+f(n):''

console.log(f());

• I think you can leave out the first &1 and save two bytes – Henrik Christensen Nov 7 '16 at 13:01
• @HenrikChristensen That would only work for n < 480. For n >= 480, we'd need parentheses: (n/240^n/5)&1. – Arnauld Nov 7 '16 at 13:14

# Bubblegum, 30 bytes

00000000: d307 8118 1020 9dc5 3544 3523 f8a4 b386  ..... ..5D5#....
00000010: aae6 e113 cfa3 f13c 1acf a3f1 0c00       .......<......


• Oh my goodness this language is awesome! – Pedro A Nov 7 '16 at 15:11

a%b=(<*[1..a]).([1..b]>>)
unlines$4%3$5%6<$>["/\\","\\/"]  Boring concats and replicates instead of playing with sines. Old was: unlines[["\\/"!!(ceiling$sin(pi*x/5)*sin(pi*y/4))|x<-[0.5..59]]|y<-[0.5..23]]


# Brainfuck, 140 bytes

>>>++++++++[>++++++>++++++++++++<<-]++++++++++>->----<<<<<+++[>++++[>++++++[>>.....>.....<<<-]>.<<-]++++[>++++++[>>>.....<.....<<-]>.<<-]<-]


:-D

• Oh, look! The brainfuck solution is eight bytes shorter than the Java solution. Time for Java coders to switch to brainfuck... – 0WJYxW9FMN Nov 7 '16 at 19:26
• Java strikes back – cliffroot Nov 7 '16 at 21:19

# Python 2, 86807674 73 bytes

for z in range(24):a=('/'*5+'\\'*5)*24;print((a+a[::-1])*3)[z*60:z*60+60]


Could probably golf a few more off it but it's a start.

Edit

Saved 6 by removing some unneeded brackets

Another 4 by using a single string and then reversing it

Thanks @Adnan. Had a late night last night and still not fully awake yet :p

-1 by moving the *24 to the variable instead of using it twice

• I believe that *6*4 is the same as *24? :p – Adnan Nov 6 '16 at 9:38

# Brainfuck, 149 bytes

++++++++++>++++++[>++++++++<-]>->+++++++++[>++++++++++<-]>++>+++[<<++++[<<++++++[>.....>>.....<<<-]<.>>>-]++++[<<++++++[>>>.....<<.....<-]<.>>>-]>>-]


The best interpreter EVAR!

This uses 6 cells (no wrapping, no modulo). Here they are:

0A 00 2F 00 5C 00


The 00 cells are used for the loop counters. Here, the counters are filled in with initial values:

0A 06 2F 04 5C 03


The leftmost counter is for the innermost loop (yes, I use nested loops of depth 3). Please note that the 4th cell (04 counter) is used twice, once for /////\\\\\..., and once for \\\\\/////... every time.

0A, 2F and 5C are the characters \n, / and \, respectively.

# Python 2.7 66 -> 56 -> 55 bytes

a="/"*5+"\\"*5;b=a[::-1];c=6*a+"\n";d=6*b+"\n";e=4*c+4*d;print e*3


new to code golfing

a="/"*5+"\\"*5;print(4*(6*a+"\n")+4*(6*a[::-1]+"\n"))*3


Thanks Stewie Griffin

Forgot a silly whitespace ;)

• Welcome to PPCG! Nice first answer :) Can you skip some of the intermediate variables? At least d and e, maybe more. I haven't tested this, but it should be close: print(4*c+4*(6*b+"\n"))*3. It's 5 bytes less. – Stewie Griffin Nov 7 '16 at 13:40
• 55 bytes: a="/"*5+"\\"*5;print(4*(6*a+"\n")+4*(6*a[::-1]+"\n"))*3 – Stewie Griffin Nov 7 '16 at 13:44

# Brainfuck, 179 bytes

->++++++++[-<++++++>]++>+++++++++[-<++++++++++>]++++++++++>>>>+++[-<++++[-<++++++[-<+++++[-<<<.>>>]+++++[-<<.>>]>]<<.>>>]++++[-<++++++[-<+++++[-<<.>>]+++++[-<<<.>>>]>]<<.>>>]>]


I know this isn't the best score in the thread but I wanted to try out brainfuck and give this a try.

Edit: I must've made an error while copypasting. This version should work

• Welcome to the site! – DJMcMayhem Nov 7 '16 at 19:02
• Does not work for me. Browser hang up with this interpreter, and personnal one show a non expected 5 line output: /////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\  four times, then infinite \ . – aluriak Nov 8 '16 at 23:34
• Yes, it works :) – aluriak Feb 26 '17 at 22:47

# Dyalog APL, 24 bytes

(60⍴5/0 4)⊖60/⍪∊3⍴⊂4/'/\'

• '/\'[4⌿5/2|+/¨⍳6 12] (requires ⎕io←0) – ngn Nov 11 '16 at 18:31
• @ngn Why don't you just post it? – Adám Nov 12 '16 at 18:33
• done – ngn Nov 12 '16 at 18:51

## Pyke, 16 bytes

"/\"6*5m*n+4*sD3


After update today that allowed " in string literals, 17 bytes

"/\\"6*5m*n+4*sD3


Try it here!

# MATL, 18 16 bytes

'\/'6:&+thK5&Y")


Try it online!

### Explanation

'\/'   % Push this string
6:     % Push array [1 2 3 4 5 6]
&+     % 6×6 matrix with all pair-wise additions from that array
th     % Concatenate horizontally with itself. Gives a 6×12 matrix
K      % Push 4
5      % Push 5
&Y"    % Repeat each entry of the matrix 4 times vertically and 5 times horizontally
% This gives a 24×60 matrix
)      % Index (modularly) into the string. This produces the desired 24×60 char array


# Pyth, 22 bytes

V6V4V12p*5?%+bN2\\\/)k


Try it here.

Explanation:

V6                     Loop 6 times, with N from 0 to 5:
V4                   Loop 4 times, with H from 0 to 3:
V12                Loop 12 times, with b from 0 to 11:
p                Print without newline
*              The repetition
5            5 times of
?            if
%          the remainder
+ b N    when the sum of b and N
2        is divided by 2
\\           then the "\" character
\/           else the "/" character
)                  End
(implicitly print with newline)
k                    k (empty string)
(implicit end)
(implicit end)


Sorry if the explanation is a little hard to understand, but it was kinda complicated.

# V, 22 21 bytes

Edit One byte won, thanks @DjMcMayhem:

5á\5á/05ä$4Ä5x$p4Ä3ä}


Changes are:

• Y4P -> 4Ä Use V duplicate line instead of Vim built-in command (this will add a blank line at the end of the paragraph)
• 3äG -> 3ä} Duplicate the paragraph instead of the whole buffer (to avoid blank line generated by previous change)

Original post

5á\5á/05ä$Y4P5x$p4Ä3äG


Try it online

Decomposed like this:

5á\                    Write 5 \
5á/                 Write 5 / after
0                Go to the beginning of the line
5ä$Copy the text to the end of the line and repeat it 5 times Y4P Copy the line and create 4 new copies 5x$p      Delete the 5 first characters and put them at the end of the line
4Ä    Duplicate this line
3äG Duplicate the whole text

• It's cool to see someone else using V! Up until recently, it's only been me. If you ever need help with it, feel free to ping me in the nineteenth byte – DJMcMayhem Nov 9 '16 at 15:39
• @DrMcMoylex Yup your language seems fun to use :-) I had a problem on this one: initially I wanted to use 5á\5á/05ä$5Ä5x$p4Ä3äG i.e. replace Y4P by 4Ä but for a reason that I don't understand it copies an additional blank line... If you can enlighten me on this one it would be nice. Also if I find some free time i'd gladly contribute to the language (especially issue #4) – statox Nov 9 '16 at 15:45
• Ah, yes that has troubled me many times. It's a known issue. The problem is that Ä is a synonym for dd, not Y. This is usually not an issue, but it causes some problems if the buffer has only one line or if you're on the last line. – DJMcMayhem Nov 9 '16 at 15:48
• Actually, I just realized, that approach would still work if you replaced 3äG with 3ä} since it won't yank that last newline. v.tryitonline.net/… – DJMcMayhem Nov 9 '16 at 15:49
• Ok I think I get why it didn't work now. And nice way to win 1 byte, thanks! – statox Nov 9 '16 at 15:56

# Jelly, 17 16 bytes

⁾/\ẋ6Wẋ4;U$ẋ3x5Y  Try it online! Thanks to 6710 (miles) for -1 byte. • I think you can save a byte with ⁾/\ẋ6Wẋ4;U$ẋ3x5Y – miles Nov 6 '16 at 9:41
• @miles Thanks, it seems I can't effectively use quicks yet :) And I knew I didn't need two Ys! – Erik the Outgolfer Nov 6 '16 at 9:45

# Actually, 21 bytes

"/\"5*SR6*;4α@R4α+3αi


Try it online!

Explanation:

"/\"5*SR6*;4α@R4α+3αi
"/\"5*                 "/\" repeated 5 times
SR               sort and reverse (result: "\\\\\/////")
6*             repeat string 6 times (forms one row)
;4α          copy and push a list containing 4 copies
@R4α+     push a list containing 4 copies of the reversed string, append to previous list (now we have one row of diamonds)
3α   repeat pattern vertically 2 more times
i  flatten and implicitly print

• Can you do something like "/\"5*S for creating the string of slashes? – Adnan Nov 6 '16 at 9:44
• @Adnan Great idea! – Mego Nov 6 '16 at 9:45

# Ruby, 46 bytes

Creates the following string (70 characters, one set more than needed) then alternates between sampling characters 0..59 and 5..64from it.

/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\


code and output

24.times{|i|puts ((?/*5+?\\*5)*7)[i/4%2*5,60]}

/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////


interesting mistake (a 7 instead of a 5)

24.times{|i|puts ((?/*5+?\\*5)*7)[i/4%2*7,60]}

/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\


# APL, 30 bytes

A←240⍴'/////\\\\\'⋄24 60⍴A,⊖A


I'm quite new to APL, (I'm using APLX, but this should work across most implementations of APL), so this is a quite simplistic solution.

### Explanation:

A ← 240 ⍴ '/////\\\\\' ⍝ set A to be a 240 character vector populated with '/////\\\\\'
⋄                      ⍝ statement separator
24 60 ⍴ A,⊖A           ⍝ populate a 24 by 60 character matrix with the concatenation
of A and the reverse of A (⊖A)


# C, 66 61 bytes

5 bytes saved thanks to orlp.

Straightforward character by character printing. 61 characters per row, last is newline (ASCII 10) and the others alternate between /47 and \ 92.

i;f(){for(i=1463;i;)putchar(i--%61?i%61/5+i/244&1?92:47:10);‌​}

//call like this
main(){f();}

• 61 bytes: i;f(){for(i=1463;i;)putchar(i--%61?i%61/5+i/244&1?92:47:10);}. – orlp Nov 6 '16 at 16:26
• @orlp thanks, I knew there had to be a better way with the i-- but I didn´t have time to look for it. – Level River St Nov 6 '16 at 21:58

# Python 2, 63 bytes

a='\n'.join([('/'*5+'\\'*5)*6]*4);print'\n'.join([a,a[::-1]]*3)


For Python 3, do this (65 bytes):

a='\n'.join([('/'*5+'\\'*5)*6]*4);print('\n'.join([a,a[::-1]]*3))

• This uses the same method as my Jelly answer. – Erik the Outgolfer Nov 6 '16 at 9:13
• More efficient method than mine to start with – ElPedro Nov 6 '16 at 9:23
• @ElPedro Basically, I just did some string/array manipulation. The trick is that I have prepared a bigger string: /////\\\\\/////... four times, separated by newlines – Erik the Outgolfer Nov 6 '16 at 9:26

# Self-modifying Brainfuck, 91 bytes

>>+++[<++++[<++++++[<.....<.....>>-]<<<.>>>>-]++++[<++++++[<<.....>.....>-]<<<.>>>>-]>-]
\/


Try it online!

Same as my brainfuck answer, but uses the 3 last characters of the source code instead of generating them at runtime.

# J, 3128 19 bytes

4#_60]|.\5#72$'/\'  ## Usage  4#_60]|.\5#72$'/\'
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////


## Octave, 50 48 bytes

Anonymous function:

@()repmat([A=repmat(47,4,5) B=A*2-2;B A ''],3,6)


You can try online here. Simply run the above command and then run the function with ans().

Essentially this creates an array of the value 47 which is 4 high and 5 wide. It then creates a second array of value 92 which is the same size.

The two arrays are concatenated into a checkerboard of [A B;B A]. The '' is concatenated as well to force conversion to character strings.

Finally the whole array is replicated 3 times down and 6 times across to form the final size.

• Saved 2 bytes, thanks @StewieGriffin
• no need for an anonymous function; save 3 bytes. – Tasos Papastylianou Nov 9 '16 at 10:48
• @TasosPapastylianou there is, otherwise it will print ans= before the pillow. Having it in the function gets around this as it is expected to return the answer to a variable rather than displaying it. – Tom Carpenter Nov 9 '16 at 11:04
• That's just semantics. I mean, if you're going to be pedantic I'd worry more about the 3-line warning messages that appear instead :p Also the usual rules state that it needs to be either an output from a direct terminal command, or a callable function handle. Meaning you should assign your anonymous function to a handle (or add another 5 bytes to account for having to pring ans()). Which is pointless, since ans() still prints ans when run! – Tasos Papastylianou Nov 9 '16 at 11:42
• @TasosPapastylianou ans() is a callable function handle, so you don't need to assign it to something with, e.g. a=@..., because it is implicitly assigned to ans as a handle. Also it doesn't print ans= when run unless you specifically ask it to by not doing anything with the returned value and not adding a ;. If you did disp(ans()) it would only print the exact output (no ans=). But yes, the warning is annoying, however that didn't happen previously, so it isn't language specific, but rather interpreter specific. – Tom Carpenter Nov 9 '16 at 13:27
• Ok, we'll agree to disagree. The way I see it, if you're relying on disp(ans()) before getting your output, then you need to add 12 bytes to your answer. My own opinion is that this is just the way octave presents its result and that's fine. – Tasos Papastylianou Nov 9 '16 at 16:14

## PHP, 73 69 bytes

for($s='/\\';$i<1440;$i++)echo$i%60<1?'
':'',$s[($i/5+($i/240|0))%2];  ### Demo http://ideone.com/z7N1Md • 69 bytes: for($s='/\\';$i<1440;$i++)echo$i%60<1?'\n':'',$s[($i/5+($i/240|0))%2]; (replace the \n with a real newline). echo isn't a function, so, it doesn't need parenthesys. Also, echo can receive multiple values, separated by a comma. This really removes the need for those parenthesys. And then, inside your $s[...], the outer-most calculation doesn't need parenthesys either, since it is contained withing []. Using $s[($i/5+($i/240|0))%2] has the same effect and is shorter. – Ismael Miguel Nov 6 '16 at 18:39
• Thank you, updated! I didn't even know about echo accepting multiple parameters ^_^ – chocochaos Nov 6 '16 at 21:24
• echo and print accept multiple parameters. But print requires parenthesys with multiple parameters when used on a loop's increment, condition or assignment. – Ismael Miguel Nov 7 '16 at 0:08
• Can shave off that <1, by switching the expressions, echo$i%60?'':' ',, new line as expression 3 in the ternary. – Progrock Nov 9 '16 at 15:56 # Java 7, 120 bytes String c(){String r="";for(int i=0;i<1440;r+=(i%60<1?"\n":"")+(i/60%8<4?i%10<5?"/":"\\":i%10<5?"\\":"/"),i++);return r;}  Pushed everything into one loop. Beats Brainfuck, mission accomplished. See it online: https://ideone.com/pZjma3 ## Vim, 44 27 bytes EDIT Lot of bytes won thanks to @DrMcMoylex: 5i\<esc>5a/<esc>0y$5PY4P5x$pY3PyGPP  Original answer: I'm not sure that really fits the rules of this site but I thought that was fun to try it: i\<esc>59.:s;\v(.{5})\1;\1/////;g<CR>Y4P5x$pY3PyGPP


Which can be decomposed like this:

i\<esc>                       Insert a \
59.                           Repeat 59 time the insertion
:s;\v(.{5})\1;\1/////;g<CR>   Match 5 characters followed by the same 5 characters
And replace them by these 5 characters followed by 5 /
Y4P                           Copy the line and repeat it 4 times
5x$p On the current line delete 5 characters and put them at the end of the line Y3P Copy the line and repeat it 3 times yG Copy all the lines PP Repeat them 2 times  • Oh hey statox, welcome to the site! This totally fits the rules. I golf mostly in vim. Just so you know, you could do 5i/<esc>5a\<esc>0y$5P at the start to save 9 bytes. – DJMcMayhem Nov 7 '16 at 20:16
• Hey DrMcMoylex (new name? :-) ) glad to see you here and that my answer fits. Also thanks for your hint, I'll edit my answer – statox Nov 7 '16 at 22:27
• Haha, yeah I temporarily changed my name because of this challenge, lol. I'll change it back in 30 days – DJMcMayhem Nov 7 '16 at 22:36

## Brainfuck, 168 bytes

++++++[>++++++++<-]>-<+++++++++[>>++++++++++<<-]>>++<<+++++[>>>++<<<-]>>>>+++[>++++[>++++++[<<<<<.....>.....>>>>-]<<<.>>-]++++[>++++++[<<<<.....<.....>>>>>-]<<<.>>-]<-]