Fill the wall behind your bed with whatever would bring you peace when you walk in.
Because the bed is often the focal point of a bedroom, the wall behind the bed is important, too. Think about what might bring you peace. Is it a lovely landscape that reminds you of the land you grew up on? Is it travel photos from that time you spent on the beach? You want the first feeling you get when you walk into your bedroom to be one of peacefulness, so consider what might do that for you and hang that on the wall behind your bed.