http://qs1969.pair.com?node_id=77619

#!/usr/bin/perl -w # how to (ab)use substr use strict; my $pi='3.14159210535152623346475240375062163750446240333543375062'; substr ($^X,0)= substr ($pi,-6);map{ substr ($^X,$.++,1)=chr( substr($pi,21,2)+ substr($pi,$_,2))}(12,28,-18,-6,-10,14);map{$^O=$"x( substr ($pi,-5,2)); substr ($^O,sin(++$a/8)*32+ substr ($pi,-2)/2+1,1)=$_; substr ($^O,sin($a/4)*( substr ($pi,2,2))+ substr ($pi,-7,-5)-1,1)=$_;print"$^O$/";eval($^X.('$b,'x3). substr ($pi,-3,1).'.'. substr ($pi,9,2));}(map{chr($_+ substr ($pi,21,2))}( substr ($pi,8)x3)=~/../g);