public function addRectangle($x1, $y1, $x2, $y2, $colors = [0, 0, 0])
    {
        $color = imagecolorallocate($this->image(), $colors[0],  $colors[1],  $colors[2]);
        imagerectangle ( $this->image() , $x1 , $y1 , $x2 , $y2 ,  $color );
    }