let y = 0;

let px = 0;

let py = 0;

let easing = 0.1;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  strokeWeight(15);

  background('yellow');

  cursor(HAND); 

}

​

function draw() {

  brush();

}

​

function brush(){

  x += (mouseX - x) * easing;

  y += (mouseY - y) * easing;

  strokeWeight(3.5); 

  ellipse(x, y, px, py);

  px = x;

  py = y;

}

​

function mousePressed(){

// background('yellow'); 

}