Second prototype indeed renders bitmaps, and takes several other shortcuts. PIL had a (very slow) `floodfill()`

, so it won by default. PIL's `arc()`

is a little annoying: it works in degrees instead of radians, 0° starts at 3 o'clock. And there is no way to draw thick arcs, so I rolled my own. Finally, I got really lazy with the arc calculations. From two pairs of two points, you can draw eight arcs. Four combinations, and each can be clockwise or counterclockwise. Later I will add code for picking the correct two arcs, but for now there are eight different arc commands. It also does not help that Schmidhuber missed an edge case.