Assemble Center Units
1. Use a pencil to mark a diagonal line on wrong side of each solid white 2" square.
2. Align a marked solid white square with one corner of a solid navy blue 4" square and sew on marked line (Diagram 1). Trim excess, leaving a 1⁄4" seam allowance. Press seam toward solid white triangle.
3. Repeat Step 2 to add solid white squares to remaining corners of solid navy blue square to make a center unit. The center unit should be 4" square including seam allowances.
4. Repeat steps 2 and 3 to make 30 center units total.