Simulation of Webservers for an F5 Lab

Hi all;

Recently I attended a 2 day training course for F5 Administration (v11)

During the labs which were on a virtualised F5 image running through VMWare, the instructor had some sort of image running in the background, which was a image that simulated webservers, when creating our F5 config, and testing, we tested by hitting the IP addresses in our web browser, and it would load up like a RED page and a BLUE page, which would give us indicication of what was being returned, and simulated the webservers.

Basically my question is, is this something thats publically available? or something similar? so what when I am configuring my F5 test labs, I can simulate webservers, rather than having to create a new VM for each webserver?

Sorry if this is a little confusing, please let me know if you need more info