Needed: 10-light 5” squares and 10-dark 5” squares and 10- light 2½” squares and 10-dark 2½” squares. Mark a diagonal line on each of the 20 small squares. Using 5 dark squares, place a light 2½” square on opposite corners of a dark 5” square. Sew across the diagonal marks. Press the resulting corners open. Cut away the underneath corner. Square to 5” x 5”. Do the same with dark 2½” squares on 5 light 5” squares .Mark a diagonal line on each additional light and dark 5” pieces.  Place a corner-pieced unit with light corners on a light 5” square. Sew ¼” from the diagonal line, cut on the diagonal line, iron, and square to 4½”. Repeat process using light corner-pieced units with light 5” squares and dark corner-pieced units with dark 5” squares. Bring all 20 for a great chance to win a lot of units.