In order to change the interior of the room, you do not need to cross old wallpaper. There is a more rational solution. You can make completely «new» wallpaper with the help of stripes, for this you just need several types of paint and, of course, your fantasy. Before starting work, it is necessary to clean the surface with a detergent. Then it is necessary to mark the boundaries of the strips using construction tape. Next, you can apply paint, and this is done from the bottom up and from dark colors go to light. In order not to buy a lot of trays for mixing paint, you can break them with foil and mix the color on it. After work, just remove unnecessary sheets of foil with paint.
