​

let switchOn = false;

​

let displayText = "off";

​

function setup() {

  createCanvas(400, 400);

  frameRate(4);

}

​

function draw() {

  background(bgcol);

  let cr = random(0, 255);

  let cg = random(0, 255);

  let cb = random(0, 255);

​

  circle(width / 2, height / 2, 50);

  textAlign(CENTER, CENTER);

  text(displayText, width / 2, height / 2);

​

  if (switchOn == true) {

    bgcol = color(cr, cg, cb);

    displayText = 'on';

  } else{

    bgcol = 0;

    displayText = 'off'

  }

}

​

​

function mouseClicked(){

  if (dist(mouseX,mouseY, width/2,height/2)<=25){

    switchOn = !switchOn

  }

}

​