So you like the look of this one do you? 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! Next you need to go to where your computer's operating system display settings and set the image as your background / wallpaper.
A different way altogether is to right click the background below, from here 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 trust you. In fact you probably already know. I'll keep a lid on it now.
Return to wallpaper thumbnails.