Fast running scene

I wanted to create a fast running scene, I had previously learnt how to do this from flash. You have to move the scenery in the opposite direction of the person running, they could be running on the spot, it would still look like they are running forward . To do this I had to make a very long AI file,  this helped me, it allowed me to just drag it from one side to the other whilst key framing the position of the layer. Below are photos of how I did this.