Keeping It All Straight

It will take 16 squares to make this tablecloth. All the squares are made exactly the same way with all the little pieces in the same pattern. The design comes from turning each square one-quarter turn as the quilt is put together. If the squares are not sewn together just right, the pattern will be lost. To help me keep track of everything, each block was given a letter and a number to mark its correct spot.