/**
 * Blending colors.
 *
 * <p>Elie Zananiri<br>
 * CART 253, Winter 2008</p>
 */

void setup() {
  size(300, 300);
  noLoop();
  noStroke();
  smooth();
  colorMode(RGB, 1.0);
}

void draw() {
  background(1.0);
  
  // draw a red circle
  fill(1.0, 0, 0, 0.5);
  ellipse(125, 125, 100, 100);
  
  // draw a green circle
  fill(0, 1.0, 0, 0.5);
  ellipse(150, 175, 100, 100);
  
  // draw a blue circle
  fill(0, 0, 1.0, 0.5);
  ellipse(175, 125, 100, 100);
}