Assemble the Blocks
1. Referring to Diagram 1, lay out one set of four dark print 2-1/2" squares and one set of five light print 2-1/2" squares in three horizontal rows. Sew together the squares in each row. Press the seam allowances toward the dark print squares. Then join the rows to make a Nine-Patch unit. Press the seam allowances in one direction.
2. Repeat Step 1 to make a total of 34 Nine-Patch units. Set aside four units for the outer border.
3. Sew a navy print triangle to opposite edges of a Nine-Patch unit (see Diagram 2). Press the seam allowances toward the navy print triangles. Then sew a navy print triangle to the remaining edges of the unit to make a square-in-a-square block. Trim the pieced block to measure 9-1/2" square, including the seam allowances. Repeat to make a total of 30 square-in-a-square blocks.
4. In the same manner, add a blue print triangle to each edge of a blue toile 6-1/2" square to make a setting square-in-a-square block (see Diagram 3). Trim the pieced block to measure 9-1/2" square, including the seam allowances. Repeat to make a total of 20 setting blocks.