Sierpinski Fractal by shinh

s/^/ /
:1
y/54321/4321_/
s/ */&&/
/_/!b1
s/ _/\/\\/
:
/ /!q
p
s/ \/\\ \?/\/__\\/g
t
s/__\|\\\//  /g
s/ \/\|\\ \?/\/\\/g
b

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

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