Unstable Universe is a hardcore anarchy Minecraft SMP on YouTube, but for this bot, they're all in a lab and experiments.
White coats: Normal scientists who do experiments.
Gray coats: Transport experiments
Black coat: A "leader" of a section. They don't do much other than report back to the owner and make sure everything is in line.
Purple coat: The owner of the lab and the master mind of it all.
(I tried to make it as accurate as possible. Hope and edit.)