Next, we'll speed piece the half squares,
by stacking the remaining Color 1, and a Color 2 2-7/8" x
17-1/4" strip, right sides together and all edges aligned. On
the back of the top strip, lightly mark the 2-7/8" square
lines. Draw in the diagonals as shown at left. Now sew a SCANT 1/4'
above and below the diagonal lines, pivoting at the square lines.
Cut this apart on the square lines, and on the diagonals between the
rows of stitching. This will give you twelve half squares. Press
seams to the darker side. Trim these units back to 2 1/2"
square if needed...