Hi, I have an unusual bedroom and window in that my room is directly under the roof, like an attic, with part of my ceiling/walls being slanted in the shape of the roof. As a result, my window is also triangular. I found images, mostly on Pinterest, of curtains installed on such windows, but I can't figure out how to actually do it. For instance, what kind of curtain rods do I need -- anything special? And how are the curtains fastened at the top so that they don't slide down? I just don't know any of the details behind how to accomplish it, and if it requires any special parts, and if so, where to get them. Below are a couple examples of what I mean (click to view full-size image). Help? I think the most pressing issue is how to affix the curtains at the top so that they're not sliding down.