<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.2/p5.js" type="text/javascript">
</script><script language="javascript" type="text/javascript">
 var system; var oldX=0; var oldY=0; var img;
function setup() {
//  img = loadImage("Android05.jpg");
img = loadImage("https://image.jimcdn.com/app/cms/image/transf/dimension=196x10000:format=png/path/sf5d368e95ee23ef6/image/i28726074297b6954/version/1470536319/image.png");
createCanvas(600, 750);
  system = new ParticleSystem(createVector(100, 20));
 }
function draw() {
 background(img);
  if (abs(mouseX - oldX)+abs(mouseY - oldY) > 100) {
      system = new ParticleSystem(createVector(mouseX, mouseY));
      oldX=mouseX; oldY=mouseY;
  }
  system.addParticle(); system.addParticle();
  system.addParticle(); system.addParticle();
  system.addParticle(); system.addParticle();
  system.addParticle(); system.addParticle();
  system.addParticle(); system.addParticle();
  system.addParticle(); system.addParticle();
  system.addParticle(); system.addParticle();
  system.addParticle(); system.addParticle();
  system.run();
  for (var i = 0; i < height; i += 20) {
    fill(125, 150, 10);
    rect(0, i, width, 5);
   }
}
// A simple Particle class
var Particle = function(position) {
  this.acceleration = createVector(0.0, 1.50);
  this.velocity = createVector(random(-20, 20), random(-20, 0));
  this.position = position.copy();
  this.lifespan = 25.0;
};
Particle.prototype.run = function() {
  this.update();
  this.display();
};
// Method to update position
Particle.prototype.update = function(){
  this.velocity.add(this.acceleration);
  this.position.add(this.velocity);
  this.lifespan -= 1;
};
// Method to display
Particle.prototype.display = function() {
  stroke(20, this.lifespan);
  strokeWeight(2);
   fill(80, 200, 255); R=random(-1, 1);
  ellipse(this.position.x, this.position.y, 10+R, 10+R);
};
// Is the particle still useful?
Particle.prototype.isDead = function(){
  if (this.lifespan < 0) {
    return true;
  } else {
    return false;
  }
};
var ParticleSystem = function(position) {
  this.origin = position.copy();
  this.particles = [];
};
ParticleSystem.prototype.addParticle = function() {
  this.particles.push(new Particle(this.origin));
};
ParticleSystem.prototype.run = function() {
  for (var i = this.particles.length-1; i >= 0; i--) {
    var p = this.particles[i];
    p.run();
    if (p.isDead()) {
      this.particles.splice(i, 1);
    }
  }
};
 </script>