const WIDTH = 600;

​

function setup() {

  createCanvas(WIDTH, HEIGHT);

}

​

function draw() {

  background(220);

  rect(0, 0, 1 * WIDTH, 0.1*HEIGHT)

  rect(0.2 * WIDTH, 0.2 * HEIGHT, 0.6 * WIDTH, 0.6 * HEIGHT)

  // try to create buttons

  rect(0.3 * WIDTH, 0.3 * HEIGHT, 0.1*WIDTH, 0.1*HEIGHT)

}