Actually the examples in the text are quite concrete - the few lines would be everything you'd have to write to get such a site working (modulo a bit of http plumbing). Obviously we are nowhere near such a thing. The rest of the text acts as a bit of a pointer what could help to get there.

From my other comment (in this case the example was an amazon like shopping site):

> The thing I would like to get working is telling the net "here is a ton of different buttons, grids, lists and a lot of other UI stuff, and there are all our products - I want to maximize revenue - do whatever you like to get there".

The way of telling a neural network these things would be these few lines of code which would hook up different parts to get it working.