Click flag. change curve and angle as it runs. It's a fractal, meaning self-similar across scales. Smoother: https://turbowarp.org/629335997?fps=60&interpolate&hqpen&stuck&clones=Infinity
The code draws fast enough that we can redraw it rapidly. This is a bit similar to the "Barnsley" fern, except this one has no random function and draws lines instead of dots. The redraw is kind of a gimmick, but works because the code is fast.