Now speed piece the center half squares, by
stacking the Color 1 and Color 3 3-7/8" x 7
3/4" strips right sides together and all edges aligned. On the
back of the top strip, mark the 3-7/8" square line. Mark the
diagonals in the direction shown at left. Sew a 1/4"
above and below the marked diagonals, pivoting at the square line.
Cut apart on the square line and on the marked diagonals between the
rows of stitching. This will give you four half squares. Press seams
to darker side and trim these to measure 3-1/2" if needed...