Chasing Hawk, what you have there is a Disappearing 9 Patch. It's beautiful.
I was thinking of a Disappearing 4 Patch. Make a 4 patch of lights and darks on opposite corners. Make a cut about 1 inch on each side of each seam. Now flip or exchange the 4 middle pieces that are tiny strips of light and dark, (not the center piece), and sew that resulting 9 patch back together. They are so cute.
If you sew these resulting squares together as is, you get a secondary pattern.
Have fun!