How to write a simple mutter plugin?

I want to create a very simple Desktop Environment using mutter or libmutter. I found out that mutter is a very simple wm but it can only be customized if I write a plugin for it. so I want to create a gnome-shell like plugin for mutter which would only tweak some window animation styles. but I am very new to creating such a thing so I would want to know how to get started. I would want it to be as simple as possible and possible in a single script file (as I want to tweak very little) .. also how do I compile it and make it to start like gnome-shell does.?