Make sure to watch it all the way through, it has a cool little outgo that looks pretty cool, anyway, there are three sprites, and the entire project starts and end using a broadcast, so you can start and stop at almost any point in your project, as long as it's the length (or shorter) of this project!
MasterSLD, I saw he had posted a project for this so I decided to also. cheekyscuola, for setting up the contest!