var ball = {

    position: createVector(random(100), random(100)),

    velocity: createVector(random(10), random(10)),

    diameter: random(40, 80),

    display: function() {

      stroke(0);

      fill(random(256), random(256), random(256));

      ellipse(this.position.x, this.position.y, this.diameter, this.diameter);

    // eyes

    fill(0);

    ellipse(this.position.x + 10, this.position.y, 5,8);

    ellipse(this.position.x - 10, this.position.y, 5,8);

    ellipse(this.position.x, this.position.y+10, 8, 5);

    }  // end display method

  }  // end ball

  return ball;

}