1. Referring to Diagram 2, sew together two green triangle-squares and two burgundy triangle-squares in pairs. Press seams in opposite directions. Join pairs to make a center block. Press seam in one direction. The block should be 8-1⁄2" square including seam allowances. Repeat to make four center blocks total.
2. Using red triangle-squares, repeat Step 1 to make four border blocks (Diagram 3).