Fox Tooth

This is a Live Wallpaper.

Here are instructions for using a live wallpaper :
http://fleenlab.blogspot.com/2012/04/how-to-set-live-wallpaper.html

The aperture was black with a darkness almost material. That tenebrousness was indeed a positive quality; for it obscured such parts of the inner walls as ought to have been revealed, and actually burst forth like smoke from its aeon-long imprisonment, visibly darkening the sun as it slunk away into the shrunken and gibbous sky on flapping membraneous wings.