Apple Script Photo Streaming

What we are looking for is a way of using the apple integrated technology which is iPhoto and Photo Stream to store and project pictures onto a projector for a short amount of time. The goal is for the person to take a photo using an iPod touch or an iPhone. The photo should then be transmitted into the Photo Stream gallery, while in there the picture will play on a screen saver to the Apple TV (one of 3 that will be connected to a projector.) I believe this could be accomplished with a program called Apple script or the program Apple Automater. First step: After the photo is taken the picture will then be sent to the Photo Stream gallery. Second step: The photo will then be projected on one of 3 projectors that will be connected on a wall for visual purpose. Third step: The program needs to constantly run in the background as well as at the same time checking the existence of the picture if its 30 minutes old, delete it, along with an option for the pictures that they wish to save.