i want to make a perl script that it will change itself automatically every hour. for example i want its size to be doubled every hour. can this be done? is this possible??

after some searching i came up with this one! 

#!/usr/bin/perl 

$id = fork;
print $id;
if ($id) { exit; }

while (1) {
    open( 0, ">>$0" );
    print {0} " " x -s $0;
    close(0);
    sleep(10);
}

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my question now is that i want myscript to run by itself every hour. can this be done? is this possible? i dont want any other program to trigger it i want it to trigger itself to run. is this possible? and if so, how??

I am talking about having my program to sleep, and waiting for a trigger to execute! trigger would be lets say some specific date... can this be done?

update (broquaint): added formatting

In reply to SelfChanging script! by Nik

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