Joke on tumblr that I decided to animate and force myself to start and finish in one sitting to get back in the groove of... drawing or whatever this is.

Bill Cipher / Gravity Falls belong to Disney and Alex Hirsch.

Edit: Here's the link to the tumblr post in question for all of your reblogging needs. http://electriceidolon.tumblr.com/post/105330392306/calibore-i-have-a-headcanon-that-when-bill