demo script for PayPal recurring payments

Hi, We want to someone show/guide us that how we can use Paypal recurring payments. condition will be 1. first 3 day are free (buyer will pay nothing) 2. after first 3 day. buyer will pay $5 for every 7 days. 3. all subscription/payments and cancellation IPN notices will be logged by script. Please only bid if you have good knowledge of IPN, and have done same work before. nothing to develop, we only need sample/demo code, so max bid cost is $30. all bid above it will be deleted. Thanks