Ah - good choice - this is one of my favourites! Do you need to know how to put this on your desktop? Setting the background as your desktop wallpaper can be done in a number of ways. You can either right click the background below and then choose 'save target as...' (IE & Opera) or 'save link as...' (Firefox). If you do this - remember where you saved it! Then set the desktop background using your computers OS's desktop or display control panel and select the image you just saved.
Another way is when the full screen wallpaper is shown, right click it and select 'save image as...' or 'set as Desktop Background' or 'Set as Background'. It'll come to you when the time is right. A walk in the park for you. You know already I'm sure. I'll shut it now then.
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