Quilt 9: interlocking pinwheels

I finished Quilt 9! I was playing around with pinwheels and realize that if there were four of them they could interlock. It's kind of fun because my mind can only see a one or two color of pinwheels at a time.

The back...

To quilt it I made X's in the center of every pinwheel. It is very visible on the yellow, but it blends in with the other colors.

And I had one corner turn out great! It's the best one I've managed to do yet.