I'm glad you like it.
@Nexus Almost. A random-number-generator defines of how many "sticks"(havn't got a better word, too) the whole arm consists. Then the program defines a specific length and anglePerSec for every stick with a random-generator, too. So the sticks don't depend on each other. The calculations are a bit harder. For every stick you need to calculate the rotation. The next arm will be connected to the first and also rotates with the specific anglePerSec-speed.
Every frame I'm drawing a line between the previous tip of the arm and the current tip of the arm. Then the program draws the line to a RenderTexture which gets displayed.
@Geheim I'm going to add a UI and I'm planning to implement screenshots so the program can fill a gallery with the screens automatically.