This is what you want:
<script language="JavaScript">
<!--
function scrollit_r21(seed)
{
var msg=" Just replace this message with what you want to say....You can add as much as you want but try to keep it short so your visitors do not get bored and impatient like you are now....LOL";
var out = " ";
var c = 1;
if (seed > 100) {
seed--;
var cmd="scrollit_r21(" + seed + "

";
timerTwo=window.setTimeout(cmd, 100) ;
}
else if (seed <= 100 && seed > 0)
{
for (c=0 ; c < seed ; c++)
{
out+=" ";
}
out+=msg;
seed--;
var cmd="scrollit_r21(" + seed + "

";
window.status=out;
timerTwo=window.setTimeout(cmd, 100);
}
else if (seed <= 0)
{
if (-seed < msg.length)
{
out+=msg.substring(-seed,msg.length);
seed--;
var cmd="scrollit_r21(" + seed + "

";
window.status=out;
timerTwo=window.setTimeout(cmd, 100) ;
}
else {
window.status=" ";
timerTwo=window.setTimeout("scrollit_r21(100)",75);
}
}
}
-->
</SCRIPT>
<body onLoad="timerONE=window.setTimeout ('scrollit_r21(100) ' ,500) ;">
</body>