Now stack the Color 1 and Color 2 1-7/8" x 15"
strips with all edges aligned. Cut this at 1-7/8" intervals to
make eight squares of each color. Keep the squares together in pairs
and on the back of the top square lightly draw in the diagonal as
shown at left in the enlargement Then sew 1/4" on each
side of the drawn line. Cut apart ON the drawn line between the rows
of stitching. Each square-pair will give you two half square units.
Press seams to darker sides. These should measure 1-1/2". You will have a total of sixteen half square units...