This sketch can be used to generate curves created
by adding together various circular motions. Each joint of the
drawing machine represents a circular motion with a frequency
(how fast it spins), amplitude (length of the joint), and phase
(starting angle).

**Basic Usage**: Use the dropdown in the top left to pick one of the
preset patterns I made, listed by symmetry type. Spacebar toggles the
drawing machine arm.

**Advanced Usage**: Use the input box to type in frequencies, amplitudes
and phases. Then press Enter. **Note:** phases are listed as
multiples of pi