1.

Use a ruler to find the approximate center square of the fabric.

2.

Mark the center square with an X.

3.

Beginning with the square to the right of the X, count to 10 and mark the 10th square with a dot.

4.

Beginning with the square to the right of the dot, count to 10 again and mark the 10 square with another dot.

5.

Beginning with the square just above the X, count to 10 and mark the 10 square with a dot.

6.

Continue outward from the center, marking every 10th square with a dot until the entire fabric is gridded.