Weddingbee boards

So I feel a bit silly posting this on WeddingBee, but I figured someone would have some good ideas for me. 

In my apartment we have this big window that looks out onto a main road. It is a bay window type, so there are three separate glass windows. There's a seat built in and the windows reach almost to the ceiling. My problem is I have no idea how to decorate for Christmas! We keep the blinds closed almost all the time because of where we live/for privacy. Any ideas of what I can make or buy to jazz things up for the holidays? I'm looking for things to put on the inside of the apartment (as opposed to things to be enjoyed from the outside). 

Here's a picture of what it looks like. This was taken right when we were moving in, so the middle blind is fixed and it's obviously a lot neater 

My parents would always put the tree in front of our bay window so people could see it from the street. If you don't want to do that, maybe string lights around the edge of the window and hang snowflakes or round ornaments at varying heights. Good Luck!