How does google animate this image?

If you go for you to
http://www.the search engines.com/, it has an image to the page that is certainly animated.If a person right push the image you will see it is not a flash swf, of course , if you see the image doable an cartoon gif.

What makes google animate this image

Script and also HTML PNG Shots

http://www.the search engines.co.uk/logos/2011/graham11-hp-start.png

site source

(function()

See Google article source

it’s some flash and also html not really hard.