​

let clickCount;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

​

  COLORS = [

    color(0),

    color(255),

    color(220, 20, 120)

  ];

​

  clickCount = 0;

}

​

function draw() {

  let colorIndex = clickCount % 3;

  background(COLORS[colorIndex]);

}

​

function mouseReleased() {

  clickCount += 1;

}

​