These wallpapers work like tiles. Put the mouse pointer over the one you want and press the right-hand mouse button. Now select Set as Wallpaper option to cover your desktop with the tiles.
Select the size of this wallpaper you want. When the picture is shown full size put the mouse pointer over it and press the right-hand mouse button. Now select the Set as Wallpaper option to use the picture.
Here are some of my favourite pictures. You can use them to redecorate your computer's desktop.