You have an equal number of square blocks of two different sizes.
Join them together in the obvious way - each small block has four of the large ones pinwheeling round it. The result is a top with a zigzag edge and all the blocks slanted with respect to the overall shape. I got the idea from Grunbaum and Shepherd's book "Tilings and Patterns" but surely it must have been used in quilting many times before. What do you call it?
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