On December 25, 2005, Google culminated one of their most recent serials with the graphic above. Google has a history of decorating their homepage during holidays or other notorious events.
And like a Berma Shave commercial, Google's serial of messages tell a story or perhaps express a message.
The picture above is the final picture in a serial they ran of a cat and mouse struggling for a way to light up the Google sign. At first they struggled to plug it into an extension cord. Then they finally opted for an alternative energy source, they plugged the lights into mouse driven treadmill that generated the electricity that lit up the lights.
BTW, I recently learned that Google's interest in sustainability and the environment have deep roots. That includes environmentally friendly lighting at their corporate headquarters.