use Schedule::Cron;

 sub run_scripts {
    system("foobar.pl");
 }
 
 # Create new object with default dispatcher
 my $cron = new Schedule::Cron();

 # Add dynamically  crontab entry
 # invoke run_scripts() every 0 minute past
 # each hour.
 $cron->add_entry("0 * * * Mon-Fri", \&run_scripts);

 # Run scheduler 
 $cron->run(detach=>1);