Question Creating another object in the current scene

I planning to create a 2d platformer coding game that has a code editor in which the user interacts to make the character move. My question is how to create another object which is like a "code editor" inside my current scene. I am not sure if that's the right thing I should call, anyway I recently learn Unity game engine.

what I've planning to do is like this:
https://www.dropbox.com/s/sz80cbinm3m5axz/Sample_of_GameDesign1.png?dl=0