Thank you, Valentina Penta, for the idea and providing the link (https://www.alvhem.com/objekt/burgardsgatan-10-lorensberg-2). I drew a blueprint trying to make it as similar as possible to the original that can be seen in the link mentioned above.
The apartment is located in Sweden (Malmö, I guess).
The idea is to decorate it w/o altering shapes and measures nor fixed features, like doors, windows, and the kitchen and bathroom layout.
Have fun, people! And show us your creativity!