Ok, question about how much fabric I'll need. I was thinking I'd do three strips on the back. Blue floral/yellow/blue floral. The quilt is 60 x 60. I figure I'll make the blue floral 25" wide (x 2) and the yellow 10" wide. This totals 60". How much of each do you I need? Is there a better layout? I'm SO not good at this part. I would prefer all 1 color, but I want to break out of my box a little bit and try something pieced.