Next speed piece the half squares, by stacking
the Color 3 and Color 2 2-7/8" x 11-1/2" strips, right
sides together and all edges aligned. On the back of the top strip,
lightly mark the 2-7/8" square lines and mark the diagonals in
the direction shown at left. Now sew 1/4" above and
below the marked diagonals, pivoting at the square lines. Now cut
apart ON the marked diagonals, and on the 2-7/8" square lines.
This will give you eight half squares. Press seam allowances towards
the darker fabric. These should measure 2-1/2".
Repeat this with a set of Color 3 and Color 1 strips of the same size,
and a set of Color 1 and Color 2 strips as well...