constructor(x, y, w, h, v, ex = 0, ey = 0) {

    this.x = x;

    this.y = y;

    this.w = w;

    this.h = h;

    this.v = v;

    this.ex = ex;

    this.ey = ey;

  }

  changeV() {

    if (this.v == 3) this.v = 0;

    else this.v++;

  }

  isOn(px, py) {

    return (px > this.x && px < this.x+this.w && py > this.y && py < this.y+this.h)

  }

  show() {

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

    textAlign(CENTER, CENTER)

    text(this.v, this.x+this.w/2, this.y+80);

  }

}