I have a code by idk how connect it to the fbx model from blender

I really have no idea what you’re talking about but I’ll give you +1 credit for at least getting the code formatting right.

Now, if you want some actual meaningful feedback from people who cannot read your mind, here is how to report your problem productively in the Unity3D forums:

http://plbm.com/?p=220

Pay particular attention to Step 5 above. That’s the critical one.

How to understand compiler and other errors and even fix them yourself: