This script should be contained all in one or two files, to keep things simple.
Basically users can "create" a prank to send their friends. Firstly, they enter their number, their friends number, and their message. Admin can choose whether the user will be charged X dollars or not on their cell for sending the prank. Aftert the user has entered the information, he/she is provided a link in which they can send to their friend. When the friend clicks the link, they will see a video like "The Ring", something scary, this video will be in flash. At the end it will say something like "you will die in 10 Days, expect a ring". At that time, the SMS text message defined by the user will be sent to the person to their cell phone, completing the prank.
Project must be completed (bug free) in maximum 7 days, no exception.