#!/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);

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In reply to How to (ab)use substr by Erudil

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