There's nothing animated about it. It's just javascript to fade the text. I did a view source and found this:
<SCRIPT LANGUAGE="JavaScript1.2" TYPE="text/javascript">
<!--
FDRboxWid = 590;
FDRboxHgt = 50;
FDRbackCol = "#054800";
FDRborWid = 0;
FDRborSty = "solid";
FDRborCol = "#054800";
FDRboxPad = 4;
FDRtxtAln = "center";
FDRlinHgt = "11pt";
FDRfntFam = "Verdana";
FDRfntCol = "#ffffff";
FDRfntSiz = "10pt";
FDRfntWgh = "bold";
FDRfntSty = "normal";
FDRlnkDec = "underline";
FDRlnkCol = "#000080";
FDRhovCol = "#800000";
FDRblendInt = 3;
FDRblendDur = 1;
FDRmaxLoops = 100;
FDRendWithFirst = false;
FDRreplayOnClick = true;
FDRjustFlip = false;
FDRhdlineCount = 1;
FDRgifSrc = "http://allterrainers.com/YaBBImages/fade.gif";
FDRgifInt = 10;
//-->
</SCRIPT>
<SCRIPT LANGUAGE='JavaScript1.2' TYPE='text/javascript'>
prefix="";
arNews = [
"<font size=\"4\">The Allterrainers would like to wish everyone a Very Merry Christmas and All the Best in The New Year! <img src=http://allterrainers.com/YaBBImages/smiley.gif></font>","" ]
</SCRIPT>
<SCRIPT LANGUAGE="JavaScript1.2" src="http://allterrainers.com/fader.js" TYPE="text/javascript"></SCRIPT>
<div align="center"><div id="elFader" style="position:relative; visibility:hidden; width:100%;">
<font face="Verdana, Arial" size=2>YaBB News Fader</font>
</div></div>
@tomic