Life is about learning, but frequently these things seems difficult if not impossible. When you don't know anything about a certain subject, it can be daunting, but when you know plenty of it, it is easy!
Coding/scripting can be very daunting, and sometimes difficult to overcome 'basic' things.
It is perfectly normal that some 'basic' stuff are very difficult to grasp in the beginning (and the 'beginning' can take longer then you would think)
With this tutorial I want to make it a bit easier to get to know certain keywords like 'var' and 'nz'