Ideas for patterns with "very fine dots"

[Greg Teft]

I like the use of triangles - a neat effect. I have a sticker in my list of things to do that I was wondering how to tackle. I was considering using the custom color capability (#2rrggbb) and throwing some rects in with linear combinations of the colors on either side, for example green to red would be 100% green, then a band of 80% green & 20% red, 60% green and 40% red, and so on.