Start a new ActionScript3 movie and save it as message.fla.

We will start with code to make the words scroll across the stage from right to left and reenter on the right.
lblMessage.x=stage.stageWidth; //put the message off on the right
addEventListener(Event.ENTER_FRAME,frames);
function frames(e:Event):void {
lblMessage.x--;
if(lblMessage.x<0-lblMessage.width) {
lblMessage.x=stage.stageWidth; //put the message off on the right
}
}
Download the flash file