Thanks everyone. I had this sudden inspiration and just hoped I had enough fabric. As I often do, it was kind of "design it as I go" and I kept holding my breath that something wouldn't come out right, but it did. The triangles on the ends were scraps trimmed from the "flying geese" blocks after I sewed the squares to the rectangles. So I needed the green borders to make them big enough to fill in the gap. Fun challenge! I knew if it didn't work, I could just keep it for myself.