constructor(animation, x, y, speed) {

    this.x = x;

    this.y = y;

    this.animation = animation;

    this.w = this.animation[0].width;

    this.len = this.animation.length;

    this.speed = speed;

    this.index = 0;

  }

​

  show() {

    let index = floor(this.index) % this.len;

    image(this.animation[index], this.x, this.y);

  }

​

  animate() {

    this.index += this.speed;

    this.x += this.speed * 15;

​

    if (this.x > width) {

      this.x = -this.w;

    }

  }

}