Keith Haring began his art career by drawing with chalk on blank boards in the New York City subway. He believed that art should be simple enough for everyone to understand and shouldn’t have deep hidden meanings. He also liked to use very simple drawings with thick outlines and colors inside them. Haring often drew with markers. If he made a mistake he just changed his idea, because erasable markers hadn’t been invented yet. Now, if you make a mistake, just erase!