I sort of made this up as I went along because I wanted to get it big enough to fit my King size bed. It started out with the 9 patch. Lights and darks with the top left corner and bottom left corner having a light dark triangles. Made a 100 9 patch and played with them until I got a design I liked. Once I got them sewn together found out they weren't quite big enough for my bed so I added the piano key boarder. Still not quite big enough so one more border and it fit the bed.