color base = 128; //color base
float angle = 0; // angle: used for color and coordinates, so it makes a pattern
float rate = 0.1;// rate of change for angle and radius
float rad = 0; // radius of spiraling pattern

void setup(){
  size(500,500); // draw canvas
  background(255); // white background
  smooth();
  noStroke(); // no outlines for circle
}

void draw(){
  // this setup for the color makes a neat pattern
  fill(base+125*cos(angle),base+125*sin(angle),base+250*sin(angle)*cos(angle));
  float x = 250 + sin(angle)*rad; // center the spiraling in the
  float y = 250 + cos(angle)*rad; // middle of the canvas
  ellipse(x,y,14,14);  //draw the circle: by making it smallish, it starbursts later on
  angle += rate;  // advance angle
  rad += rate; // advance radius
}