What kind of drapes/curtains do you put over a sliding glass door?

The sliding glass door going out to the back yard just looks so plain. We just got a new dining room table (this is the room with the door) and i want to finish the room with some curtains.

There are vertical 3″ blinds up and that’s all. The kind you can slide open or closed.

What would look good over this door? Something i can open and close….i have no clue about stuff like this.