​

function setup() {

  createCanvas(400, 400);

}

​

function mousePressed() {

  backgroundChange = true;

}

​

function draw() {

  if (backgroundChange === true) {

    background(255, 0, 100);

  } else {

    background(0); 

  }

}

​

​

​

​

​

​

​

​

​