Assemble Nine-Patch Units
1. Lay out one set of green or red print 1-1/2" squares and four tan print 1-1/2" squares in three rows (Diagram 1).
2. Sew together squares in each row. Press seams toward green or red print.
3. Join rows to make a Nine-Patch unit. Press seams in one direction. The unit should be 3-1/2" square including seam allowances. Repeat to make 45 Nine-Patch units total.