Take the small center green and sew it to the brown, and then to the green triangle. Do all eight of those. Then put them together two at a time, then the four major seams. Then sew the white triangle to the big green triangle, and then the brown triangle to the other big green triangle, then put those two sections together, sewing the white and brown together. Do that four times, then put those four corners onto the center of the block. That should simplify it a whole lot.
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