Text trail menu

Hi all,
I am willing to do a menu composed of array of letters…
I constructed that as five items and than a short strip with description revealed after an appropriate button is rolled over …what I claimed to do was a trail of letters going towards the new position on the right to give space to previous clicked item and its description …whatever I got stuck on infinite loops and that stuff…
Anybody done this before ? I had played with strings before but never experienced such multiple characters shift in a trail…
Thanx in advance