1. Create four squares, using the rectangle tool. Each square needs to be four inches.
  2. place the next square at the left-bottom corner, so that those two corners are touching.
  3. Place the third square in the middle of those two squares, on the left, overlapping it equally on to the other squares.
  4. Do the same thing with the fourth square towards the right, this time the sqaure will also overlap with the third square, where the upper-left corner is directly in the center of the third square.
  5. Now the third square should have its lower-right corner directly in the center of the fourth square. There is no color.