tubular bathroom towel radiator

1)air vent 2)towel peg 3)big towel peg 4)regulation vent and connection to piping 5)toilet roll holder will be made of 22 mm diameter copper piping, on a bathroom wall any design welcome, corners must be 90 or 45, T branches can be used. cant be too complicated, overall size max cca 0,9 x 1,8 m (WxH) i want it to look robotic and/or mixed with some animalcreature or a spaceship. haha. thanks!

I have to operate a Dynobend tube-bending machine at work. If you wish, I could bend a test version of this. Assuming the line 5) is actually the size of a regular toilet roll holder I don't even need the measures. I only doubt if there's a standard width of toilet rolls, or if there are European/Asian/American variations. Are the connections going to be welded or screwed?