Place a Color 3 3-1/2" square right sides together against
the left end of a Color 1 rectangle, with outside edges aligned. (I
show them staggered here just so you can see I am talking about two
separate pieces of fabric) On the back of the square draw in the
diagonal in the direction shown at top left. Sew on this drawn line.
Cut off excess seam allowance and press remainder towards the corner.
Repeat this with another Color 3 square on the opposite end, noting
direction of diagonal. Make four units like this. Make four more units
using Color 2 rectangles, noting direction of diagonals...
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