This is what I wish to achieve. Use chroma screen, record myself walking let us say two or three steps, and then use that footage to put in a background, but instead it showing me walking few steps, it loops as if I'm walking all steps across screen in one direction.

I have a moving background, lets say a long street. I want to be able to be seen walking in the long street from right to left of the screen. I know the trick is to use chroma screen effect with the green material. That is solved and is possible. However, how can I play with the video tricks using cyberlink powerdirector to show that I'm walking from one end to another, while just recording at certain length? For example, is there a way that can loop my walking steps endlessly so it shows I keep walking from one end to another (while reality I just walked two or three steps) recorded and then it shows I keep walking on screen?