​

function setup(){

  cnv = createCanvas(400, 400);

}

​

function draw(){

  background(random(255));

  console.log(random(255));

}

​

function doubleClicked(){

  fun();

}

​

function fun(){

 while (true){

   background(random(255), 0, random(255));

  if (keyIsPressed === true) {

    break;

 }

}

}