Filling a Rectangle with 4 different color gradients

I am trying to fill a rectangle with 4 different color gradients as follows:

The first area I want to go from Red - > Red Yellow

The second area I want to go from is Red Yellow -> Yellow

next area i want to fill is Yellow -> Yellow Green

and finall Yellow Green -> Green

What approach should I use?

Thanks for the insight.

[377 byte] By [MattBallarda] at [2007-11-27 6:45:05]