There is a super simple pattern called stretched stars. I found it in a Georgia Bonesteel book and looks stunning when put together. I used it for my GS and used all kinds of prints a boy would be interested in, then cornered it with bright red with white stars print. You really don't need to have a pattern. Cut desired size squares, cut 2 triangles for each square of the accent fabric. Sew the triangles on two corners diagonally from each other, ie, top right and bottom left. I didn't trim the background of the square so that the blocks would be stable. When you put them together the effect is like "stretched stars.