Sew a Color 3 quarter square triangle right sides
together to the left and right of a Color 1 rectangle in a 1/4" seam. as shown at top left. Press seams to darker
sides. Now sew a Color 2 half square triangle to the left
corner as shown at far bottom left. Add a Color 1 half square
triangle to finish one quarter of the block. Make another unit like
this, and two more with Color 2 where the Color 1 pieces were in
these... on to Page 2!