Mouse down to draw. Number keys to change the number of rotations. Up & down arrows to change pen size. C to clear. L to toggle lines from centre. X to toggle auto mode (program starts drawing randomly) V to show/hide variables. Try using Turbo Mode. Tip: turn on Turbo Mode, then press X, then press & hold C!
21/03/17 Shared. 22/03/17 Improved auto mode. Added ability to draw with auto mode on.