The perl code is calling the "sleep" command (ie command line program). I'm guessing WinXP doesn't have a program with that name.

On my Slackware box though I get a message that says the argument is invalid because sleep(man 1) requires an integer number of seconds or minutes or hours or days.

Changing the sleep command on line 121 from:

sleep&0.05");}sub&limits&{print&"\e[3;2H";for($i=0;$
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to

sleep&1");}sub&limits&{print&"\e[3;2H";for($i=0;$
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lets the program run but it runs at one frame per second.

Kind of reminds me of the old FreeBSD console screen saver.