Google’s homepage has always been simple and rigid. Those who wanted to customize the homepage with widgets, they have to switch to igoogle. Slowly, Google has made the search bar big introduced fade in fade out effects.
Now,inspired by Ask.com’s themes and Bing’s wallpapers, Google will allow users to add a background image to the Google homepage.
You can find an option “ CHANGE BACKGROUND IMAGE” in the bottom left corner of the Google's homepage. This option allows you to add pictures from your web album Picasa, your computer and Google by default provides certain wallpapers.