force animations

[robives]

I'm in the process of doing a series of animations on structures and forces. I want to create (in Flash 8) animations which show how forces are transmitted within structures. See the attached pdf, I'd like a way of animating the force arrows perhaps so they change colour or size in a flow in the direction of the arrows. Hopefully this will be a way that will be easily adaptable to other structure diagrams. Any help would be gratefully received!
Thanks
- Rob

[flashpipe1]

Hmm...no attached file, but animating arrows & changing colors is pretty easy...