Depending on how one wants the room to feel has a big impact on the lines used in the room along with many other things. If someone wants a harmonious feeling in the room go with horizontal lines throughout the room. These bring a calming sensation that is very common for a bedroom. Long horizontal lines make the room feel bigger and broader which is perfect for small master bedrooms. For a kids room diangular lines are perfect. They often are the pop of color in the room that is perfect for any age. They reflect the wildness of children and all the action they have.