HELP! Shelves like Inca Walls

Hi to everyone! i'm trying to build this shelves that look like inca walls for a university project, i was able arrived to create some similar (at least for me i'm a newbie in this) but i still have some troubles, because some of the division panels line up with each other and they should because its suppose to work like masonry bricks! and i dont know how to give them a slitgh inclination (like inca walls). If anyone can help me it would be great! i attach the definition!

IncaShelves.gh