slideshow/flush

Hello, I'm looking for a way to do something, not sure if someone can help me. I would like to be able to "control", in a way, what a remote user is seeing, almost like running a slideshow. For example, user goes to website, it shows block of text or picture. I login to admin area.I click "next" or something, and it either advances to another page, or to another picture, and so on. I know you can kind of do a live output using flush, but what about forcing it to another page? Any ideas would be great! Thanks, Bryan