Pair up each focus fabric square with a background square and make them all into Half Square Triangle Units.
Half Square Triangles using squares:
Place a light colored square wrong side up in front of you.
Draw a diagonal line thru the middle of the square.
Match up to the other colored square, right sides together.
Sew ¼” on both sides of the drawn line.
Cut on the drawn line.
Press the block toward the darker color.
