I made mine in quarters, then sewed the quarters together. I sewed a row of four, laid it aside, sewed the next row of four and the sewed these two together. I checked their placement on the board as I picked up the next two rows. When a 4 by 4 unit was done, I left it and did the next quarter (quadrant). Then I sewed the quarters to halves and one last seam across the center.