OK -- will someone smarter than me (which means everyone here), give me an idea of how many colours I will need? I'd like to keep some colour scheme, not do it completely scrappy. I got confused on the directions of the first one with backgrounds 1, 2, and 3. I thought to keep some harmony between the blocks, I'd use a constant background, but it looks like some squares (rectangles?) need more than one background? See, I'm already begging for help and we haven't even started yet!