I recently moved into a new apartment, and after unpacking all the furniture I realised that the walls looked much emptier than I had expected.  Now I am considering buying a few pieces of artwork, but I do not want to fill every available space just for the sake of decoration. I would rather choose a small number of works that actually add something to the rooms. The living room is quite bright and minimalist, while the bedroom has warmer colours, so I am not sure whether I should look for completely different styles or try to create some connection between the spaces. How would you approach it?