 The second opening sequence, from episode 14 onward, also features  an homage to (or imitation of) the work of an earlier animator.  Specifically, some of the swirling abstract shapes in the  background, preceding the appearance of the main title logo, are  lifted directly from "Studie Nr. 7," a piece of experimental  animation crafted in 1931 by the German artist Oskar Fischinger.