/**
 * Alternating backgrounds.
 *
 * <p>Elie Zananiri<br>
 * CART 253, Winter 2008</p>
 */
 
void setup() {
  size(300, 300);
  frameRate(5);
  smooth();
  noStroke();
}

void draw() {
  // if the frame count ends with 0...
  if (frameCount%10 == 0) {
    // ...draw a yellow background
    background(240, 229, 17);
    
  // if the frame count is even and the mouse is on the left side...
  } else if ((frameCount%2 == 0) && (mouseX < width/2)) {
    // ...draw a red background
    background(216, 35, 35);
    
  } else {
    // draw a blue background
    background(35, 103, 216);
  }
}