function pisca(cor) {
    var element = document.getElementById("frase");

    if (element != null) {
        if (cor == "0") {
            element.style.color = '#C5C5C5';
            window.setTimeout("pisca('1')", 4100);
        }
        else if (cor == "1") {
            element.style.color = '#336699';
            window.setTimeout("pisca('2')", 800);
        }
        else if (cor == "2") {
            element.style.color = '#C5C5C5';
            window.setTimeout("pisca('3')", 700);
        }
        else if (cor == "3") {
            element.style.color = '#336699';
            window.setTimeout("pisca('0')", 800);
        }
    }
}