OKAY, this explains a lot. I am color/placement challenged. Except for the movement of the dark purple blocks from the corners to somewhere else, they all look the same to me. Like I just spent two minutes looking at 6 & 7 before I finally saw the difference. It was similar to one of those cartoon puzzles where they have 2 images and you are supposed to find the differences. Your color choices are just beautiful and I'm obviously no help at all!!!