One of the good background ideas that you can always use in your house would be to have a wallpaper image that is made especially for your house. There are lots of wallpaper images that you can use in your house such as those that have beach backgrounds, those that have flowery backgrounds, those that have animal prints and so on. All these wallpaper images have something that will make them unique, this uniqueness will help you in choosing which wallpaper image to have in your house. It is not difficult to find a wallpaper that you think will fit your house. With a little bit of research you will definitely find what 
