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#Powershell, 77 bytes#

I must say I thought this would be easier with PowerShell, but it's quite hard to create something more condense than this.

$a=@("/","\");"$(1..6|%{1..3|%{1..6|%{$a[$b]*5;$a[!$b]*5};"rn"}; $b=!$b})"

More readable:

$a=@("/","\")
"$(1..6|%{
    1..3|%{ 
     1..6|%{
     $a[$b]*5
     $a[!$b]*5
        }
     "`r`n"}
    $b=!$b})"

I'm using the index numbers of the array in order to decide whether I should put \ or / and between every loop I simply toggle the variable.