Possibly one of the most intersting ones on the site. Yawn! I suppose you what to know how to get it on the desktop now. Setting the background as your desktop wallpaper can be done in a number of ways. One way is to right click the wallpaper below and then select 'save target as...' (IE & Opera) or 'save link as...' (Firefox). If you do this - don't forget where you saved it! Then go to wherever you set the background for you particular computer / operating system and select the image.
Another way is when the full screen background has loaded, right click it and choose 'save image as...' or 'set as Desktop Background' or 'Set as Background'. You'll have a flash of inspiration when the time comes. I think you have it in you. You probably already know in fact. I'll keep it shut now.
Return to wallpaper thumbnails.