Membuat animasi text warna berjalan dengan script neon evek

<h2>
<script language="JavaScript1.2">

/*
Neon Lights Text
By JavaScript Kit (http://javascriptkit.com)
For this script, TOS, and 100s more DHTML scripts,
Visit http://www.dynamicdrive.com
*/

var message="Welcome to Dynamic Drive!"
var neonbasecolor="gray"
var neontextcolor="yellow"
var flashspeed=100  //in milliseconds

///No need to edit below this line/////

var n=0
if (document.all||document.getElementById){
document.write('<font color="'+neonbasecolor+'">')
for (m=0;m<message.length;m++)
document.write('<span id="neonlight'+m+'">'+message.charAt(m)+'</span>')
document.write('</font>')
}
else
document.write(message)

function crossref(number){
var crossobj=document.all? eval("document.all.neonlight"+number) : document.getElementById("neonlight"+number)
return crossobj
}

function neon(){

//Change all letters to base color
if (n==0){
for (m=0;m<message.length;m++)
//eval("document.all.neonlight"+m).style.color=neonbasecolor
crossref(m).style.color=neonbasecolor
}

//cycle through and change individual letters to neon color
crossref(n).style.color=neontextcolor

if (n<message.length-1)
n++
else{
n=0
clearInterval(flashing)
setTimeout("beginneon()",1500)
return
}
}

function beginneon(){
if (document.all||document.getElementById)
flashing=setInterval("neon()",flashspeed)
}
beginneon()


</script>
</h2>