Oh, do you know how to make triangle squares? A blue zillion old fashioned quilt blocks can be made with triangle squares alone or mixed with just regular squares. Then you can chose to set the blocks together as they are, or with sashing or with bigger solid blocks. There's a lot of variety in coloring and arrangements.
Most 9 patch blocks are fairly simple. This 9 block meaning 3 squares (triangle squares or simple squares) across and 3 rows of 3.