Patrice - it's just a stained glass pattern -
This is where I got the idea to do what I did - very simple. I did it a bit different in that I started with 9" blocks, cut them apart, mixed around the fabric and sewed them back together. I cut 90- 9" blocks (all different) and then divided them into 10 stacks. I left one hole, and laid out 9 cutting patterns for the others, not going smaller than 2"x2". I tried to use similar sizes so I would have more to mix and match when I put them back together.
http://www.lauriesrandommusings.com/2010/01/picture-tutorial-how-to-make-seattle.html