www.neuron.yale.edu

In this video (https://www.youtube.com/watch?v=oTKqTmcP8Pg), Ajay demonstrates some basics of using NEURON gui and interpreting the simplest mechanisms. I would like to use and fiddle with this model myself, as well as see the code behind it, so I can more quickly get an understanding of how this works. Does anyone know where I could download the "Action Potential" folder that he uses in the video, or can point me to a tutorial of how to make one for myself? Searching on ModelDB merely for "Action Potential" doesn't yield anything as simple as this.

On NEURON's Documentation page http://www.neuron.yale.edu/neuron/docs try
Construction and Use of Models: Part 1. Elementary Tools