Description From Play Store:

Draws a series of colorful geometric designs while you watch. Each shape is drawn from mathematical equations. It is entertaining to watch. Now has all of the patterns but includes advertisements in the settings page.. If you like the app please take a look at the paid version Geo Pixel Live Wallpaper which contains no advertisements.

The Full app is available Here

To set the live wallpaper as your background either hit the settings button or Long touch the background.

You should be prompted with an option to set your wallpaper. Select Live wallpapers. Then select Geo Pixel Live Wallpaper Demo from the list. Then push the Set wallpaper button to set it as your current wallpaper.