// Daniel Shiffman

// http://natureofcode.com

​

// Child class constructor

class Particle extends VerletParticle2D {

  constructor(x, y) {

    super(x, y);

    this.radius = 4;

  }

  // Override the display method

  display() {

    fill(127);

    stroke(200);

    strokeWeight(2);

    ellipse(this.x, this.y, this.radius * 2, this.radius * 2);

  }

}