Zentangle art is non-representational and unplanned so you can focus on each stroke and not worry about the result. There is no up or down to Zentangle art. If fact, you can most easily create Zentangle art by rotating your tile as you tangle -- always keeping your hand in a relaxed position. You don't need to know what a tangle is going to look like to draw it. You just need to know the steps. The result is a delightful surprise.