Facebook has painted a massive 42ft square QR code on its headquarters roof. Scanning it opens the new FB QR Code Page on Facebook which anyone can view. The man behind the gigantic code is Facebook employee, Mark Pike. “It started with a comment on Zuck’s post. I wrote, “Hack yeah! I’d like to paint a gigantic QR code somewhere so we can RickRoll online maps, or point people to our careers site, or send them to a ‘Clarissa Explains it All’ GeoCities Page,” explains Pike.