Hi Cecil Thank you so much for your quick reply. It was my first time and I did not know you have actually replied so soon. Thank you. Thanks for the example. Ok it is a sliding door and it is proportionate with the wall. But it happen to be my excellent direction and because of that it is difficult for me to sleep with my head facing that direction because the portion of the wall is not big enough for my bed. What can be done? Can i sleep at that direction and dont open the side of the sliding door. It is a 2 doors sliding door. I have attached a diagram. Pls advise, thanks. Ling Hui