Try setting phase change to equal angle change. I like both at 15. Increase phase change by 1 or 2. Try setting phase change to zero. Try other settings. Radius alters size. Spacebar to change color palette.
Each dot moves in straight line, set by a sine function. "Changes" in angle & phase are from one dot to the next. It shows much about sine functions and phases, if you look at the very brief code and experiment.
