s,t=0,['\n']*1721\x0d for w in 8,6,4,2:\x0d r=range(41-2*s)\x0d for y in r:\x0d for x in r:t[(y+s)*42+s+x]=[' ','[]'][y%w==0 or x%w==0]\x0d s+=w\x0d print''.join(t),

Note that non-ascii characters in the above source code will be escaped (such as \x9f).