To make the blocks center, place a Color 2
2-1/2" square right sides together and edges aligned with the bottom left corner of a
Color 1 4-1/2" square. On the back of the top small square lightly draw the diagonal.
Stitch on this diagonal line. Cut off the excess seam allowance, pressing the remainder
towards the larger square. Repeat this with another Color 2 small square on the opposing
corner. Now repeat again on the bottom right corner, using a Color 3
and pressing the seam allowance towards the corner triangle. Make four units like this...