The proposal uses symmetrical approach to x, y axes, leaving clear &
free the central passage. No dims really required, if you just start by
putting the bed in the middle of the long wall, leaving equal spaces
for desk and wardrobe. Simple structures were preferred to "bunk bed"
solutions, since the height isn't sufficient. Wardrobes are a bit
shorter than asked, but additional storage have been scheduled, over the
bed and the desk (sliding doors preferable). Colours are rather
indicative, left more to personal taste, as are easy to redecorate at
any time.