canH = 400;

let x = 200,

  y = 200;

let extraCanvas;

function setup() {

  createCanvas(canW, canH);

  extraCanvas = createGraphics(400, 400);

  extraCanvas.clear();

  // extraCanvas.background(200);

  // background(0);

}

​

function draw() {

  // No trail : ANIMATE ✔, DRAW ❌

  // background(0);

  strokeWeight(0);

  x = random(200, 225);

  y = random(200, 225);

  // square(x, y, 20);

​

  if (mouseIsPressed) {

    // DRAW ✔ , ANIMATE ❌

    extraCanvas.strokeWeight(0);

    extraCanvas.fill(100,50,200)

    extraCanvas.circle(mouseX, mouseY, 20);

    if (mouseX > canW) {

      extraCanvas.clear();

    }

  }

  image(extraCanvas, 0, 0);

  square(x, y, 20);

  circle(200,20,50);

}

​