1) Draw a pair of parallel lines where the stitching will go. Pull the needle through from the back of the fabric to the front at the edge of the lower line.
2) Insert the needle into the fabric at the upper line. bring it back out a the lower line directly below where it was inserted and with the point over the thread as it is coming out of the fabric.
3) Pull up the stitch to form a loop. Repeat Steps 2 and 3.