hope she doesn't come early! :)
Oh, I just love your pattern! A couple of years ago, I started a pinwheel afghan; it was a much more difficult pattern, which is probably why it never got finished. Your design is perfect. (I may just steal it!)
I actually learned how to do this from my sister. She showed me how to make the two colored squares. Once I learned how to do that, the rest was easy. I just found a pinwheel quilt pattern on line and adapted my afghan pattern to it.