Blocks Transition in jpgRotator Question

i am very intrigued at the BLOCKS transition in [COLOR=#22229c]jpgRotator[/COLOR]. Do you guys know any tutorial that would teach me how to do that transition, i dont want to use jpgrotator by the way because i want my images to be in the SWF file in itself. i am using flash mx 2004 with AS 2.0.

i saw another using the same actionscripting principles [COLOR=#22229c]here[/COLOR]. Instead of blocks it utilized circles.