udacity/cs291 — pull request #12 by zeffii (2013-04-27 11:07:18+00:00)
Title: Update create-stairs.js

modified the cup function, from individual ```position.x y z``` to ```position.set(x,y,z)```, to be more consistent with how you set up other scene elements which don't need to be modified by the student.

Also modified several indentation and trailing white space issues.

So how should this indentation work, use spaces or tabs? and how many.