Nice - this gives me some concepts to play with. If nothing else, I've learnt today (from reading the excerpt from the O'Reilly book that someone posted) that perl -de 0 is a much better environment for checking quick answers to questions posted or CB'd to perlmonks...

map{$a=1-$_/10;map{$d=$a;$e=$b=$_/20-2;map{($d,$e)=(2*$d*$e+$a,$e**2
-$d**2+$b);$c=$d**2+$e**2>4?$d=8:_}1..50;print$c}0..59;print$/}0..20
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