text: function sparkle(pos, vel) {
    this.pos = pos;
    this.vel = vel;
    this.acc = createVector(0, 0);
    this.color = color(random(0, 200), random(0, 200), random(0, 200))
  
    this.update = function() {
      this.vel.add(this.acc);
      this.pos.add(this.vel);
      this.acc = createVector(0, 0);
    };
  
    this.applyForce = function(f) {
      this.acc.add(f);
    };
  
    this.offScreen = function() {
      return this.pos.x > width || this.pos.x < 0 || this.pos.y > height;
    };
  
    this.show = function() {
      stroke(this.color);
      fill(this.color);
      ellipse(this.pos.x, this.pos.y, 2, 2);
    };
  }
  