Hi Randy!
Take a look at this and let me know if it's what you're looking for:
http://www.eurovoice.nl/cow/FractalLowerThirds.aep
Look at Wiping fractals 2.
Basically, I've used an adjustment layer set to Hard Light with a moving ramp. Placed that over the layer with the fractal noise. To finish things of, I added an adjustment layer with a threshold on it, to have the blocks switch on instead of fading in.
Wiping fractals 1 is something I made because I hadn't read your post properly the first time. I left it in 'cause I think it makes for an interesting effect none the less.
Yours,
Andra
