On the right hand side of the page opposite the date is the numerical order of the posts. The answer by BobK in 2008 is just as pertinent today as it was then. Unless you've got an American Express or VISA number you're willing to give out, no one will write your code for you. But if you look on this site you'll find examples of how to do it. If you make an attempt most people will help you figure out your errors in code or schematic. The beginning is up to you.