Ahhh thank you! When I was googling for a flash effect, I didn't know what it was called, so I kept getting a bunch of stuff about making, like, lightning strike and weather effects, and stumbled across that coding snippet somewhere. Since it worked out of the box I didn't really mess with it haha. But anyway, that page looks very useful & now I wanna play with more transitions. I've only been using the default so far. Thanks again hehe