If you like to stare at ever moving screens and not have to do anything, this app is for you.

If you are familiar with old computer screensavers, you might remember one that is just a bunch of lines that bounce around the screen. This does the same thing.

The line(s) start bouncing as soon as the app starts, so there's no user interaction necessary. But if you want to change things up, tap the screen to get it to restart. Or double-tap the screen and you can change the speed it moves, the shape it is, the thickness of the line, whether it's just a line or a solid shape, the background color, and how many "trails" it has.

Depending on your device, setting high values for some of these options may slow down your device or overheat it.