​

function setup() {

  createCanvas(560, 390);

  let text = createP("Click and drag to add box");

  text.position(15, 5);

}

​

function draw() {

  background(220);

​

  //when the mouse is pressed, add a new box object

  if (mouseIsPressed) {

    let b = new Box(mouseX, mouseY);

    boxes.push(b);

  }

  //display all the box objects

  for (let i = 0; i < boxes.length; i++) {

    boxes[i].display();

  }

}