A bunch of enthusiasts collecting math visualization videos. Check out more in images and videos folder.
The plot is made on a complex plane; x representing the real axis and y the imaginary axis, as in x+iy.
A random curve is traced everytime you run exponentialSums.py. A whole video of 200 random exponential curves is rendered by hypotrochoidDances.py.
Check instruction.txt in epicyclesDrawing folder for information about how it is drawn.