penny auction bidding

Hi all, I have a penny auction website needs a bit of change on the bidding system. At the moment if 2 or more biddes place autobids, the bids go all in the same time... need to go 1 by 1 at the auction time set ( ex auction time is 30 seconds. autobids need to release every 30 sec) Please post your best bid and you will get the job, as it needs to get done asap. With this future small projects to improve the site will be available. You need to have programming experience with live penny auctions. Thank you