Use Strategy pattern on a Python/Pygame project

I'm working on a project on python, we have to create a Maniac Shooter game with the library pygame. At the moment I'm trying to use a Strategy pattern to create ennemi that can move (and shoot) with a specific pattern. The is the structure I have imagined for my program

I don't know how to use it properly. I'm not going to put all my code here unless someone is interested in helping me. Sorry for my bad english, I'm french.