Web Site Hit Counter with Functionality

I have a web site that I am looking to add a special feature to. It is very basic but cannot find any information on how to accomplish the task, that is where an experienced coder could hopefully come in. All I require is that you build a hit counter using pure code, no 3rd party software or coding of any sort, must be completely unique. Here is where it gets tricky (at least to me), I am going to be rewarding certain number of visitors to my site. I need to be able to know when visitor number 1,000; 5,000; 25,000; etc. come on. Each user must be registered. This is similar to what grocery stores used to do for the "50,000th" customer of the year. Just looking to add a little fun and excitement to my site. I will need a way to update the visitor count, prizes, etc on my own. Also, a form that will allow the member to sign up for this new feature so the address is available securely and for this purpose only.(Not linked to the sites normal features and signup form). ## Deliverables I also need a visual output of the hit counter, I will provide the image(s)