And, sticking with the principle that we must iterate as many times as the original and that the output must look the same I've stolen a few ideas from other code and come up with

-l map{$i=$_/20-1;print map{$r=$;=$_/20;$z=$i;$b=$";($m=$r*$r)+($n=$z*
+$z)>4?$b='+':($z=2*$r*$z+$i,$r=$m-$n+$;)for a..iv;$b}-46..13}0..39
[download]

Which wc tells me is 136 chars long (counting 3 for "-l\n" in the same fashion as the perl.golf crowd). Having tried all the shorter solutions I've seen so far in this thread, I've not found one that actually works, but this one does.

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