Random Glow

Hi guys,
I’m making a website and I need some help with the effects (I’m kind of new to this–which you’ll see pretty quickly :stuck_out_tongue: ). I am planning on having some circles (it’s hard to explain, but they’re art) on the site, and I’m looking for an effect that will randomly make individual circles glow. I thought about putting the circles in movie clips with corresponding glow effects in separate movie clips behind them, and then having a script call the glow clips in randomly. But the only tutorials I could find call the movie clips in on load, and I want it to happen while the page is being viewed, and not just each time the page is visited. I don’t know if this is a really bad idea/way of doing it, but if anyone has any ideas or suggestions I’d really appreciate it :).