ActionScript 2.0 :: Adding Time Limit To Image Slider?

How to do the Flash Slider in less then an hour. I followed this tutorial: [URL]. And got it right on the first time, sweet! Here is the ActionScript 3.0 that came out from it

stop();
button1.addEventListener(MouseEvent.CLICK,showpic1 );
button2.addEventListener(MouseEvent.CLICK,showpic2 );
button3.addEventListener(MouseEvent.CLICK,showpic3 );
button4.addEventListener(MouseEvent.CLICK,showpic4 );
button5.addEventListener(MouseEvent.CLICK,showpic5 );
function showpic1(Event:MouseEvent):void{
[Code] .....

5 buttons, 5 thumbs. I click on the third thumbnail, it shows me the 3rd picture. Pretty simple, pretty straight forward. How do I add a time limit? For instance if I click on button #3, and I stay there for 12 seconds without clicking, it goes to #4, 12 seconds later to #5, 12 seconds later to #1, etc?