3 added 40 characters in body

# Python 2, 131100100 84 bytes

My first answer on Code Golf!

-47 bytes overall thanks to @SriotchilismO'Zaic

a,b=[],len(x)
for i in range(2*b-1):
if b<=ii<b:a+=x[i]
else:a=a[:-1];print''.join(a)1]
else:a+=x[i];print''print''.join(a)


# Python 2, 131100 bytes

My first answer on Code Golf!

a,b=[],len(x)
for i in range(2*b-1):
if b<=i:a=a[:-1];print''.join(a)
else:a+=x[i];print''.join(a)


Try it online!

# Python 2, 131100 84 bytes

My first answer on Code Golf!

-47 bytes overall thanks to @SriotchilismO'Zaic

a,b=[],len(x)
for i in range(2*b-1):
if i<b:a+=x[i]
else:a=a[:-1]
print''.join(a)


Try it online!

2 deleted 62 characters in body

# Python 2, 131131 100 bytes

My first answer on Code Golf!

a,c=[]b=[],1len(x)
for i in range(0,2*len(x)2*b-1):
if len(x)==c-1b<=i:
a=a[a=a[:-1]
print ''1];print''.join(a)
else:
a.append(x[i])
print ''a+=x[i];print''.join(a)
c+=1



# Python 2, 131 bytes

My first answer on Code Golf!

a,c=[],1
for i in range(0,2*len(x)-1):
if len(x)==c-1:
a=a[:-1]
print ''.join(a)
else:
a.append(x[i])
print ''.join(a)
c+=1



Try it online!

# Python 2, 131 100 bytes

My first answer on Code Golf!

a,b=[],len(x)
for i in range(2*b-1):
if b<=i:a=a[:-1];print''.join(a)
else:a+=x[i];print''.join(a)


Try it online!

1

# Python 2, 131 bytes

My first answer on Code Golf!

a,c=[],1
for i in range(0,2*len(x)-1):
if len(x)==c-1:
a=a[:-1]
print ''.join(a)
else:
a.append(x[i])
print ''.join(a)
c+=1



Try it online!