All XKCD jokes aside, can a feature be added to a bash script to move the mouse every X seconds to prevent the screensaver from activating? As is it, I launch mplayer through a script that sets some preferences (such as -zoom). Can I add something to that script which wiggles the mouse?

Relevant joke:
xkcd - A webcomic of romance, sarcasm, math, and language - By Randall Munroe

Thanks in advance.