What about a Disappearing 9P or a 4 to 9 patch? Both are simple but look complex and they both look great with large prints. If you did the 4 to 9 patch, you could make your 4 patches with the doggie and blue material together and the red and yellow together in your blocks then alternate their placement to create a diagonal pattern. I did this starting out with 5" squares - fast, easy and looked great!