We're seeing your space in triplicate, but only the same two walls. Comment here and upload views of the rest of the room for best help.

I think an office space is a great opportunity to put together a little gallery wall space. Find 5-7 small pieces of art or hang-able objects. These could be photos, small prints, or even a tiny shelf with a decorative object on it. Since you don't have a huge wall space to work with, this will enliven the space and allow you to put up some of your favorite visual art. Just remember not to let it get out of control - try taping a square/rectangle of masking tape and place the objects just within that space.