constructor(x, y, w, h) {

    this.x = x;

    this.y = y;

    this.w = w;

    this.h = h;

  }

  update() {

    if(keyIsPressed) {

      if (keyCode == LEFT_ARROW) {

        this.x -= 6;

      }

      if (keyCode == RIGHT_ARROW) {

        this.x += 6;

      }

      if (keyCode == UP_ARROW) {

        this.y -= 6;

      }

      if (keyCode == DOWN_ARROW) {

        this.y += 6;

      }

    }

  }

  show() {

    rectMode(CENTER);

    fill(30, 40, 200);

    rect(this.x, this.y, this.w, this.h);

  }

}