Report London 2012 Olympic Cauldron... in London 2012 Ceremonies Discussions Posted July 16, 2012 If you look closer, you'll see there are five rings. That's pretty obvious what that is. My questions are... What are those blue boxes? What is that blue-green angular thing on the roof just to the right of the Tor, above the grey strip of seating? And that green mesh on the other side?