Algodoo

This is similar to my first version of the scene but with one major difference: The patterns are created automatically by two motor-driven spinning circles. One generates the sine (X axis) and the other generates the cosine (Y axis). Just like in the previous scene, you can change how the following pen follows the drawing pen with X and the Y keys. And now you can also change the drawing speed of both pens, as well as their directions.

The Arrow keys control the Sine and Cosine generators.