Time format for a countdown

I kind of managed to do it, however, i ran into another issue. Once the milliseconds or seconds reach 0, they don’t start over to count for the next second/minute respectively. I’ve tried Do N and While Loop to try and fix it, but Do N does nothing and While loop crashes the engine. here’s my setup and a screenshot of the issue.
Note that the millisecond stopped counting down when it reached 0 of the 59th second

http://i.imgur.com/0oBxCnJ.jpg

http://i.imgur.com/YSP0y1W.jpg