PVector pos; PVector vel; float r; void setup() { size(500, 500); colorMode(HSB, 360, 100, 100, 100); pos = new PVector (0, 0); vel = new PVector(1, 1); background(0, 0, 100); } void draw() { fill(0, 0, 100, 5); rect(0, 0, width, height); …