#1Cutting
From dark brown print cut 2 (20"-wide) strips into 3 (20") squares and 2 (12") squares; cut the 20" squares diagonally in both directions for 12 side setting triangles (2 extra) and the 12" squares in half diagonally for 4 corner setting triangles. A corrected pattern PDF was posted.
Official — archived source see the source ↗