Sliding Colour Bars Effect - How to?

Hi,

I’m trying to emulate the transition effect from this site:

http://www.venuliving.com/

When you click through the various sections, coloured bars expand and move across the flash part of the site, hold while subtly moving and then shrink out once the section has loaded.

Does anybody have any idea how this sort of thing is achieved? I’ve been considering creating the whole thing using coloured rectangles and TweenMax but I’m wondering if this was created dynamically in AS3? Or if it’s a customization of some existing transition?

Any advice would be greatly appreciated.

Thank you