If your terminal/putty/shell window stays colored after running this (as mine does, which is a little annoying :) and you're not familiar with shell escapes for colorizing foregrounds/backgrounds of terminal/putty/shell windows (as I wasn't), be sure to have on of these handy for resetting your colors to the way they were:

perl -e 'printf "\e[0%dm", 0'
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:)

Update: D'oh! Yes of course. I was busy just replacing the line from the excellent explanation above:

printf "\e[$escape;%dm", int(rand 6) + 101 - 60 * ($is_windows || 0);
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... with something that wouldn't leave my window a different color that I didn't even bother to shorten it beyond printf "\e[0%dm", 0. But seeing liverpole's comment below, I feel completely silly for not "golfing" it further.

$/  =  q#(\w)#  ;  sub  sig { print scalar reverse  join  ' ',  @_  } 
+ sig
map { s$\$/\$/$\$2\$1$g && $_ } split( ' ', ",erckha rlPe erthnoa stJu
+" );
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