public function getHTMLStars() {

        $treshold_score = $this->seo_score - 2 < 0 ? 0 : $this->seo_score - 2;

        $num_stars   = intval(ceil($treshold_score) / 2);

        $num_nostars = 5 - $num_stars;

        $html = '<div id="fivestar-widget">';

        for ($i = 1; $i <= $num_stars; $i++) {
            $html .= '<div class="star on"></div>';
        }
        if ($treshold_score % 2) {
            $html .= '<div class="star on-half"></div>';
            $num_nostars--;
        }
        for ($i = 1; $i <= $num_nostars; $i++) {
            $html .= '<div class="star"></div>';
        }


        $html .= '</div>';
        return $html;
    }