phpFOX - Raffle Script - repost

I'd like a raffle system implemented into my phpFox website. We already have a points system, you'll be using an already full table. Users can buy entries with their points. Each entry costs 500 points. Mock Design: [login to view URL] I do not need CMS. I need: - The ability to reset the clock, and add a new item and description. - At the end of the timer, the winner chosen and logged in a txt file. - The total number of tickets purchased. - The total number a user has purchased. - The chance they have of winning based on total number and their amount. - User with most tickets. - User must not be able to abuse system. Ticket purchasing field must be protected from negative entries. Lowest bidder wins.