I see two alternating blocks. The first one is a sixteen patch: four squares across and four squares down. The second block has a double curved piece in each of the four corners. If you click on one of the pictures it'll stop the slideshow so you have time to study the quilt before it changes to the next picture.
Edit: Nix that. This top can be pieced that way, but by the colors I can see that's not the way it was assembled. It was assembled the way Gay diagrammed it above.
Last edited by JustAbitCrazy; 10-06-2017 at 04:19 AM.