I have the same thing on my computer, its called Festive Lights. I don't know what kind of computer you have, but for this particular one you need a mac and it will display on your dashboard. If you want to get it off the dashboard you can by opening the terminal and entering
defaults write com.apple.dashboard devmode YES
(then press enter)
killall Dock
(then press enter) then you will be able to go onto your dashboard and grab whichever widget you want and hit the dashboard button again to bring it to the desktop.
Here is the link to download the festive lights:
link
