Just play with the variable's values and try to figure out the full shape. Press space to draw your own shape and press space again to confirm. Any shape can be drawn by using infinite many epicycles, but N of them are enough to for the line to intersect in N points. To set more thant 200 epicycles press x. To switch to "cinematic mode" press z (Turbo mode reccommended) If you are asking what eicycles are, they are simply some arrows rotating at constant speeds. Imagine a clock where the minutes' hand begins where the hours' ends and the seconds' hand is positioned at the end of the minutes' hand. This clock is the representation of a system of epicyles, since each hand rotates at a constant speed. Credit to 3Blue1Brown for his video, it was really well explained: https://www.youtube.com/watch?v=r6sGWTCMz2k
