​

function setup() {

 createCanvas(windowWidth, windowHeight);

}

​

function draw() {

  background(0,0,30,25);

​

  //amount of particles comes out

  for(let i=0; i<15; i++){

  p = new Particle();

  particles.push(p);

  }

  //burst

  for(let i = particles.length-1; i>=0; i--){

    particles[i].update();

    particles[i].show();

    //make the alpha = 0 ones disappear

    if(particles[i].gone()){

       particles.splice(i,1);

       }

  }

}

​

class Particle {

  constructor(){

    this.x = width/2;

    this.y = height/2;

    this.movex = random(-0.01,0.01);

    this.movey = random(-0.01,0.01);

    this.thin = 255;

    this.size = 10;

    this.sizee = 0.5;

     this.color = 250;

  }

  update(){

    this.x += this.movex*mouseX;

    this.y += this.movey*mouseY;

    this.thin -= 0.8;

    this.size -= mouseX*this.sizee;

   this.color -=2;

  }

  gone(){

    return this.thin <0;

  }

  show(){

    rectMode(CENTER);

    noStroke();

    fill(250,250,this.color,this.thin);

    circle(this.x,this.y,4);

​

  }

}

​

​

​

​