You'll need to setup a cron job, assuming you're using a linux host. If so, try doing "crontab -e", if that brings you into an editor to edit your crontab, then exit out and read man crontab to figure out how to use it. It looks pretty complicated at first, but if you just read the man page it makes perfect sense. This also assumes your linux host allows the users to run their own crons.
If you're on a windows host, I have no idea.