Not sure what exactly you are having trouble with, but here's how I would draft it. If the focus blocks are 10", then the smaller ones are simply quarter blocks - so 5" square. I would draft it as 5" blocks on point, 2 blocks high, 5 (or 6?) across. Then colour the 4 blocks to make your focus, and pull the "simple block" for the quarter log cabin. I'd venture 3" light blue square and 2" strips on two sides of that. The setting triangles should just fall into place.