I fail to see exactly what your trying to do. If your just trying to have a script run every so often, look into cron jobs. If your looking for a 'dynamic' homepage, then write the entire thing in perl, and have the script pull and/or execute the other parts you need.
In short we need more information on what exactly you are trying to accomplish.
Comment on Re: Automatic execution of a CGI program on a web page besides a counter
Actually what I was after was using Perl to change the graphic on the front page and the title of the page at random each time someone visited the page. Hence my curiosity to if it could be done in Perl, and how. That's why I queried about the counter example as something that does run without being invoked as a form is for example.
Some people fall from grace. I prefer a running start...