5-Patch Variation - Page 2 Step 3. Referring to Diagram III, sew piece D to each side of two of the units made in Step 2. Diagram III Step 4. Referring to Diagram IV, sew piece A to each side of the remaining two units made in Step 2. Diagram IV Step 5. Mark match points on wrong side of all the pieces included in the square-in-a-square unit. Referring to Diagram V, assemble one unit. Diagram V Block Assembly Click on "block icon" to view tiled block-to-block setting. Quilt Blocks Index Page