For the back, I wanted to keep it super simple, so I did! I had just enough of the putty to make up the whole back, and then I took all of the scraps that I had from the "windows" on the front, and put together a long strip. As far as that strip goes, I didn't cut anything, which I thought was kind of cool. I just used what I had, and added in some of the putty to make it go the whole length of the quilt. Oh yeah, and I made the label, too.
I chose pretty much the same color thread as the background fabric (which I think is called Putty), and I think that's the one thing I wish I could change - you really can't see the quilting, and the quilting is my favorite part!