It looks like it would be pretty easy to draw up, start with an 18" block x 4 = 72 plus a 6" border (4 inch pieced and 2 inch plain) for 84x84.
The flying geese unit would be the same 4" as in the border. That is, each geese unit is 2" x 4". Add the 2" strips, and then you need a 9.5 square cut in half along the diagonal for the corners. I'd probably cut at 10" and trim down.
Correction made for setting triangles, am drawing up the block but having some technical difficulties, should be able to post diagram ina couple.
Last edited by Iceblossom; 10-22-2019 at 11:53 AM.