Fwiw, this dates from 2016. Maybe put (2016) in the title?

https://cloud.google.com/blog/big-data/2016/07/understanding...

Tensorfire is much cooler:

https://tenso.rs/demos/fast-neural-style/

I wonder when most NN users will get past tinkering.

Tensorfire is "cooler" in its capabilities, sure, but this Tensorflow playground was Assignment #1 in my 'Intro to Deep Learning' class. With just a little tutelage, this page can be a great intuitive explainer for how NNs work.