x: 0,

  y: 0,

};

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(220, 20, 120);

  noLoop();

}

​

function draw() {}

​

function mousePressed() {

  mouseDown.x = mouseX;

  mouseDown.y = mouseY;

}

​

function mouseReleased() {

  let rW = mouseX - mouseDown.x;

  let rH = mouseY - mouseDown.y;

  rect(mouseDown.x, mouseDown.y, rW, rH);

}

​