// Daniel Shiffman

// http://natureofcode.com

​

let ps;

​

function setup() {

  createCanvas(640, 360);

  ps = new ParticleSystem(createVector(width / 2, 50));

}

​

function draw() {

  background(200);

​

  // Option #1 (move the Particle System origin)

  ps.origin.set(mouseX, mouseY, 0);

​

  ps.addParticle();

  ps.run();

​

  // Option #2 (move the Particle System origin)

  // ps.addParticle(mouseX, mouseY);

​

​

​

}