DEMO: Dòng chữ đổi màu và chớp tắt tại khối chính đầu tiên trên trang này.

Thầy Cô copy và dán code sau vào khối chính tự tạo rồi chỉnh sửa câu chữ phù hợp theo ý thích.

<center><script type="text/javascript">

farbbibliothek = new Array();
farbbibliothek[0] = new Array("#FF0000","#FF1100","#FF2200","#FF3300","#FF4400","#FF5500","#FF6600","#FF7700","#FF8800","#FF9900","#FFaa00","#FFbb00","#FFcc00","#FFdd00","#FFee00","#FFff00","#FFee00","#FFdd00","#FFcc00","#FFbb00","#FFaa00","#FF9900","#FF8800","#FF7700","#FF6600","#FF5500","#FF4400","#FF3300","#FF2200","#FF1100");
farbbibliothek[1] = new Array("#00FF00","#000000","#00FF00","#00FF00");
farbbibliothek[2] = new Array("#00FF00","#FF0000","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00","#00FF00");
farbbibliothek[3] = new Array("#FF0000","#FF4000","#FF8000","#FFC000","#FFFF00","#C0FF00","#80FF00","#40FF00","#00FF00","#00FF40","#00FF80","#00FFC0","#00FFFF","#00C0FF","#0080FF","#0040FF","#0000FF","#4000FF","#8000FF","#C000FF","#FF00FF","#FF00C0","#FF0080","#FF0040");
farbbibliothek[4] = new Array("#FF0000","#EE0000","#DD0000","#CC0000","#BB0000","#AA0000","#990000","#880000","#770000","#660000","#550000","#440000","#330000","#220000","#110000","#000000","#110000","#220000","#330000","#440000","#550000","#660000","#770000","#880000","#990000","#AA0000","#BB0000","#CC0000","#DD0000","#EE0000");
farbbibliothek[5] = new Array("#000000","#000000","#000000","#FFFFFF","#FFFFFF","#FFFFFF");
farbbibliothek[6] = new Array("#0000FF","#FFFF00");
farben = farbbibliothek[4];
function farbschrift()
{
for(var i=0 ; i<Buchstabe.length; i++)
{
document.all["a"+i].style.color=farben[i];
}
farbverlauf();
}
function string2array(text)
{
Buchstabe = new Array();
while(farben.length<text.length)
{
farben = farben.concat(farben);
}
k=0;
while(k<=text.length)
{
Buchstabe[k] = text.charAt(k);
k++;
}
}
function divserzeugen()
{
for(var i=0 ; i<Buchstabe.length; i++)
{
document.write("<span id='a"+i+"' class='a"+i+"'>"+Buchstabe[i] + "<\/span>");
}
farbschrift();
}
var a=1;
function farbverlauf()
{
for(var i=0 ; i<farben.length; i++)
{
farben[i-1]=farben[i];
}
farben[farben.length-1]=farben[-1];

setTimeout("farbschrift()",30);
}
//
var farbsatz=1;
function farbtauscher()
{
farben = farbbibliothek[farbsatz];
while(farben.length<text.length)
{
farben = farben.concat(farben);
}
farbsatz=Math.floor(Math.random()*(farbbibliothek.length-0.0001));
}
setInterval("farbtauscher()",5000);

text= "CHÚC THẦY CÔ CÙNG GIA ĐÌNH MỘT NĂM MỚI AN KHANG - THỊNH VƯỢNG !"; //h
string2array(text);
divserzeugen();
//document.write(text);
</script></center>

Chúc Thầy Cô VỌC VUI VẺ !