[Automatic Toilet paper roller and Cutter]

My name is Calvin Kim and i was wondering how this person got everything to work in a order..

here is the link:

http://youtube.com/watch?v=7osnNl7tyTw

He made it roll the toilet paper first then the bottim thing folded it and at last it cuts it. ???

I am really curious about how to do this.  I am trying to do this for a school project.  So how do i make everything go in an order?? casue if i did it everything would go at once. Please hlpe me.


Thank you,

Calvin Kim