let doubleClickCount;

let dragDistance;

​

let mX;

let mY;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

​

  clickCount = 0;

  doubleClickCount = 0;

  dragDistance = 0;

​

  mX = width / 2;

  mY = height / 2;

}

​

function draw() {

  background(220, 10, 120);

​

  let clickDiam = 20 + 4 * clickCount + 12 * doubleClickCount;

  let mDiam = clickDiam + dragDistance;

​

  ellipse(mX, mY, mDiam);

}

​

function mousePressed() {

  mX = mouseX;

  mY = mouseY;

}

​

function mouseReleased() {

  dragDistance = 0;

}

​

function mouseClicked() {

  clickCount += 1;

}

​

function doubleClicked() {

  doubleClickCount += 1;

}

​

function mouseDragged() {

  dragDistance = abs(mouseX - mX) + abs(mouseY - mY);

}

​