This is very nice artwork, but will someone PLEASE explain to me just what the hell the deal is with all these different-colored rings? I hear people talking about Red Lanterns and Blue Lanterns and Yellow Lanterns and Black Lanterns, and I just get more and more confused. Where did all these different Lanterns come from? What happened to the Green Lanterns? What do all these different colors MEAN? I am deeply befogged, and crave explanation.