I would run a row of straight sitiching about a 1/4" and trim odd the excess. Mark a faint line with 24" ruler and sew about 3/8" seam from the cut edge, insuring you won't loose your points. I like to float my points as opposed to loosing them. You will have about 1/8" of background to your border. This is what I would do. Others have great ideas too.