/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://dflab.sketchpad.cc/sp/pad/view/ro.GeeOWp$YpUx/rev.179
 * 
 * authors: 
 *   André Reis

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



float diameter; 
float angle = 0;

void setup() {
  size(400, 400);
  diameter = height - 10;

  fill(25, 204, 0);
}

void draw() {
  
  background(20,20,200);

  float d1 = 10 + (sin(angle) * diameter/2) + diameter/3;
  float d2 = 10 + (sin(angle + PI) * diameter/2) + diameter/3;
  float d3 = 10 + (sin(angle) * diameter/2) + diameter/3;
  
  ellipse(0, height/2, d1, d1);
  ellipse(width/2, height/2, d2, d2);
  ellipse(width, height/2, d3, d3);

  angle += 0.009;

}