The pattern calls for 80 Drunkards Path. That's 320 dark and light squares with 320 dark and light quarter circles which are sewn on top of the squares. The first photo shows them getting made.
The 2nd has the first side on.
Both sides on.
The 3rd side.
and finally all finished. Yay!
and just to finish it off the last feather border.
This now measures 45" and it is square, even though the photo doesn't give that impression.