The name of this one is given as “An Envelope Motif” in Barbara Brackman’s Block Base program. It probably has all kinds of other names as well.
Cutting Instructions:
Light Fabric #1: cut 4 squares @ 2 3/8 x 2 3/8 inches
Light Fabric #2: cut 4 squares @ 2 3/8 x 2 3/8 inches
Dark Fabric # 1, #2, #3 and #4 cut 2 squares @ 2 3/8 x 2 3/8 inches
Assembly:
Draw a diagonal line on the wrong side of each of the light 2 3/8 inch squares. Pair up the four light #1 fabrics with the dark #1 and dark #2 fabrics. Pair up the four light #2 fabrics with the dark #3 and dark #4 fabrics. Sew all these pairs with a 1/4 inch seam on either side of the drawn diagonal lines. Cut them apart on the drawn line and press to the dark fabrics.
Arrange your triangle squares as shown below and sew together.
Go here for the finishing instructions.The large triangles on the outside are lights this time.