Gypsum board Decors and partitioning

Uploaded a Sketchup drawing for open space inside an apartment ( the rest of the apartment is not attached as the focus on the attached living rooms ). There is a Gypsum board box on the perimeter of the rooms. As you can also notice, it is almost L shaped. I am looking for a design that takes into consideration the following: - If you pull Wall A, it will go through the main door and not anywhere on the wall between the window and the main door. - The Gypsum board box already installed should not be removed but could use it to complement your design - Would prefer some Arabesque decor but also should consider that enough lighting should be present - You can remove the text labels on the attached sketchup file, they are there just to guide you.