Groovy-Looking Dragonfly I Saw Yesterday

This may be the coolest insect I've seen in an environment that's been completely littered with insects. From a distance, the wings were almost completely transparent, so it just looked like this thing had little black rectangles hovering near it magically. I wish there were a way to look up bugs (and other things) from their description, but I assume identifying this fellow would take more time than I can justify. I'm calling it "Pretty Black and Blue Thingy."