Here are the images if you want to cheat.

http://www.google.com/logos/2011/verne-hp-1.png

http://www.google.com/logos/2011/verne-hp-2.png

http://www.google.com/logos/2011/verne-hp-3.png

http://www.google.com/logos/2011/verne-hp-4.png