Sew a Color 4 strip to the left of a
Color1/Color2 rectangle pair, with Color 1 on top. Press seam
towards strip. Sew a Color 3 strip to the right of this. Press seam
towards strip. Make four units like this...
Now sew the four units together and it's done! Good
Job! See how fast that is??!
Here are three blocks by four, and in this
quilt I've added another color for alternate blocks! Two thin
borders surround the quilt top, then a pieced square border!