By alternating the cords, tie a knot around the other cord. This will result in a thinner bracelet. It may not be as even in the pattern if you do not keep the knots close together. Follow the finishing steps from the article.
If you want a solidly-knotted bracelet, use strings that are approximately 2 yards long for a bracelet. If you only plan to knot 10 knots, you can get away with...