The second to last background is called "splitter" and it just draws a black line down each frame.
__________________ Bobo Adobo is funnier and smarter than all of you, proven by the fact that he is currently in a high-paying and important government job where he earns a fat cash paycheck and much pussy. How did he get so famous and successful you ask? It's simple: he has never, in his entire life, watched one second of anime.
- Outerspacekid