Then speed piece the remaining 3-7/8" x 7-3/4" strip of each
color, by stacking them right sides together with all edges aligned. Mark the 3-7/8" square line
, mark the diagonals in
the direction shown as well, then sew 1/4" above and below the diagonal
markings, pivoting at the 3-7/8" square line. Cut apart ON the marked diagonal, and cut apart on the square
line also. This will give you four half squares. Trim to measure
3-1/2" if needed...