let b2;

let gravity = 1;

​

function setup() {

  createCanvas(400, 400);

  b = new ball(width/2, 10, 0.3, 2, 3);

  b2 = new ball(width/4, 10, 0.5, 0.2, 3);

  //frameRate(2);

}

​

function draw() {

  background(0)

  b.update(gravity);

  b2.update(gravity);

  b.collide(b2)

}

​

function mousePressed() {

  b.x = mouseX;

  b.y = mouseY;

}