[GIF] Control shake
![[GIF] Control shake](https://cdn.dribbble.com/users/4033/screenshots/990279/media/905229bd058e309e76eb65a5cbf7da74.gif)
Indicating an invalid input, an idea courtesy of OS X login screen... assuming, of course, they haven't patented it.
Indicating an invalid input, an idea courtesy of OS X login screen... assuming, of course, they haven't patented it.