I still have some free backgrounds / wallpaper for your computer if you are interested. Most have a detecting theme. I even added a couple new ones. These are designed so that when tiled they match up seamlessly.

If you see one you like, copy it to your drive and tile it on your background. If you are using Windows, all you have to do is right click on the picture with your mouse and go to set as wallpaper. Then go to your control panels, select display and select tile. Check back I may have some more for you.

I would be happy to design a custom background made from your finds, for a small fee. Pictures of kids, pets, detectors, you name it, they can all be cool on your computer background.