Nodes Example?

All I have been able to do succesfully is add color to objects with nodes. What I am asking for is basically an example of something useful done with nodes. All I can find is the basic examples of what everything does but nothing really useful as a tutorial about how it all fits together in a project. It is useless to tell me what each window does without giving me an example of how to put it all together, so anyone who can help me with this will be much apreciated.

See post # 14 by Conz3D:

See post # 14 by me: