This is the code, only change the 3 lines that i have put in all caps. It works best on an all white background.
<script type="text/javascript"> /*********************************************** * Fading Scroller- © Dynamic Drive DHTML code library (www.dynamicdrive.com) * This notice MUST stay intact for legal use * Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code ***********************************************/ var delay = 2000; //set delay between message change (in miliseconds) var maxsteps=30; // number of steps to take to change from start color to endcolor var stepdelay=40; // time in miliseconds of a single step //**Note: maxsteps*stepdelay will be total time in miliseconds of fading effect var startcolor= new Array(255,255,255); // start color (red, green, blue) var endcolor=new Array(0,0,0); // end color (red, green, blue) var fcontent=new Array(); begintag='<div style="font: normal 14px Arial; padding: 5px;">'; //set opening tag, such as font declarations fcontent[0]="CHANGE THIS TO WHAT YOU WANT IT TO SAY"; fcontent[1]="AND THIS...................."; fcontent[2]="AND THIS, DO NOT CHANGE ANYTHING ELSE!!!"; closetag='</div>'; var fwidth='150px'; //set scroller width var fheight='150px'; //set scroller height var fadelinks=1; //should links inside scroller content also fade like text? 0 for no, 1 for yes. ///No need to edit below this line///////////////// var ie4=document.all&&!document.getElementById; var DOM2=document.getElementById; var faderdelay=0; var index=0; /*Rafael Raposo edited function*/ //function to change content function changecontent(){ if (index>=fcontent.length) index=0 if (DOM2){ document.getElementById("fscroller").style.color="rgb("+startcolor[0]+", "+startcolor[1]+", "+startcolor[2]+")" document.getElementById("fscroller").innerHTML=begintag+fcontent[index]+closetag if (fadelinks) linkcolorchange(1); colorfade(1, 15); } else if (ie4) document.all.fscroller.innerHTML=begintag+fcontent[index]+closetag; index++ } // colorfade() partially by Marcio Galli for Netscape Communications. //////////// // Modified by Dynamicdrive.com function linkcolorchange(step){ var obj=document.getElementById("fscroller").getElementsByTagName("A"); if (obj.length>0){ for (i=0;i<obj.length;i++) obj[i].style.color=getstepcolor(step); } } /*Rafael Raposo edited function*/ var fadecounter; function colorfade(step) { if(step<=maxsteps) { document.getElementById("fscroller").style.color=getstepcolor(step); if (fadelinks) linkcolorchange(step); step++; fadecounter=setTimeout("colorfade("+step+")",stepdelay); }else{ clearTimeout(fadecounter); document.getElementById("fscroller").style.color="rgb("+endcolor[0]+", "+endcolor[1]+", "+endcolor[2]+")"; setTimeout("changecontent()", delay); } } /*Rafael Raposo's new function*/ function getstepcolor(step) { var diff var newcolor=new Array(3); for(var i=0;i<3;i++) { diff = (startcolor[i]-endcolor[i]); if(diff > 0) { newcolor[i] = startcolor[i]-(Math.round((diff/maxsteps))*step); } else { newcolor[i] = startcolor[i]+(Math.round((Math.abs(diff)/maxsteps))*step); } } return ("rgb(" + newcolor[0] + ", " + newcolor[1] + ", " + newcolor[2] + ")"); } if (ie4||DOM2) document.write('<div id="fscroller" style="border:1px solid black;width:'+fwidth+';height:'+fheight+'"></div>'); if (window.addEventListener) window.addEventListener("load", changecontent, false) else if (window.attachEvent) window.attachEvent("onload", changecontent) else if (document.getElementById) window.onload=changecontent </script>

Credit: Eryca