anarchy golf - the source code

spiral by pooq

3 :0(1!:1)3
a=.|.|:{;~1":i.".y
r=.''
while.#a do.r=.r,{.a
a=.|.|:}.a
end.wd;:inv r
)

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