Press A to pause and press L to play, if you pause the simulation, you can see that the pattern is mirrored. There are currently 465 possible combinations of color speed, starting twirl, and starting color. If the combination is 0/2.25/Normal, that's the combination I used on the thumbnail. The whole number part of the starting swirl (middle in combination) defines how many lines of each color will be, like for example, if you get a starting swirl of 5.50, there will be 5 lines for each color.
I wonder if the whole stage will get completely filled at some point, I still see black parts.
