I chose to make this one with the same marbled background I've been making most of my other blocks. I put that fabric into a block exchange my guild is doing, so I'm getting nine 12.5 inch blocks in a few months, and these will go into that quilt. I've used soft hand dyes and marbles for this one, and it's OK, but not great, especially with that huge expanse of colour in the big squares. The bonus is this: I misread the directions, and I have twice as many HST as I need, so next time we need 2.5 inch HST, I've got them. But my accuracy is better, although this is about 1/8 inch bigger than it needs to be.