Custom Pricing Module for Opencart or Magento or other

I need a custom pricing module for Opencart or Magento or any other open source shopping cart (I must first approve what you want to use). It should be a stand-alone module and must work with any template I might install on my Opencart or Magento site. This custom pricing module will do the following: anywhere on the website where price appears, it will be continuously ticking down like a timer. The price should be live updated every second (the user can see the price going down). Here is an example of price ticking down: [login to view URL] See detailed project specifications in the attached file before bidding.