Assemble the Block
1. Sew together one white print triangle and one red print triangle to make a triangle-square (Triangle-Square Diagram). Press the seam allowance toward the red print triangle. Repeat to make a total of four triangle-squares.
2. Sew together the triangle-squares in pairs. Press the seam allowances in opposite directions. Then join the pairs to make a block (Block Assembly Diagram). Press the seam allowance in one direction.