Сочинение про мою комнату на британском с предлогами на в под

I have a very nice room. It is large and bright. There is a big desk right next to the window. The chair is under the desk. And the bin is behind the chair. I also have a cosy sofa between the desk and the cupboard. I keep all my books in that cupboard. My cat usually sleeps on the sofa. There is a mirror opposite to the wardrobe. I often leave my backpack in front of the mirror.