Learning How To Code Neural Networks -- Learning New Stuff

This is the second post in a series of me trying to learn something new over a short period of time. The first time consisted of learning how to do machine learning in a week. This time I've tried to learn neural networks. While I didn't manage to do it within a week, due to various reasons, I did get a basic understanding of it throughout the summer and autumn of 2015. By basic understanding, I mean that I finally know how to code simple neural networks from scratch on my own.