Well, I tried your suggestions j0schi but sadly they didn't work.
The first one has 2 problems:
1. There is no .scale as far as I can see that I can add in the expression "set scale balls.scale"
2. While the movement part does seem to do what I want, it doesn't adress the part that once they reach the center of the rhomb I want them to expand/move back to their original position.
The second suggestion doesn't work at all for what I want. Because if I set it like that then the balls that are farther from the center start way bigger then the rest. I need all of them to start/end at the size that I originally set them to.
Any other ideas guys?
P.S. Sorry if I'm not explaining it too well guys, it's the damn heat!! After every 2 letters typed I have to stop to wipe the sweat from my brow.... I can't work like this!!!:( So let me know which parts are unclear and I'll try to do a better job at explaining them.