In Turing Paint, those directions are determined by paths marked in black, similar to the lines of an AsciiDots program. However, the real charm of Turing Paint is in the crudeness of its programs' visual design, where programs can be quickly scribbled doodles, so long as the logic is correct. Even with the Turing machine model I had several iterations of redesigns, making different tradeoffs between making the language simpler (e.g. using fewer colors), making it easier to learn for new users, and making the language more powerful (i.e. how difficult it is to perform some common programming tasks).