Looping a list

I’m trying to make a loop, according another list.
I think that is possible to understand watching the image below.

I don’t follow. What function are you trying to apply?

In really, i need the room of each part, but it’s impossible.
Is possible to get only the room to each wall.

In this case, is just to manage my lists…

Something like this…


This seems like a good option. What’s wrong with doing it this way?

@daniel.petrin See if this gives you an idea …