Ask HN: Fake Traffic Generator

I have become slightly obsessed with the bloomberg article, http://www.bloomberg.com/features/2015-click-fraud/

Can anyone point me to some php scripts / git / gist or pastebin that generates this traffic. I just built one in php, I'm getting the session cookie and the page downloaded, but not sure if it's counting as a hit?

I really should be working on other things, but creating a 100 twitbot army is what got me into programming in the first place.