A piece I'm working on

So this is something I drew on Wednesday. It's not finished, but I'm not sure where I'm going with it yet. It's too purely decorative at this point - which is okay sometimes, but I personally wanted more out of it.

It needs some kind of background, but I'm afraid if I add one I'll sacrifice the contrast of the black and white tree with the colored cranes... because if I make the background black and white, it'll make the detail on the tree less obvious, but if I make it colored the cranes will fade into it.

I considered making clouds out of the silver ink but then the strings will fade away. Also, none of these things are going to transform it out of "purely decorative" yet... I need something more interesting in there. Problem is I really don't have a concept for it... I just have been drawing paper cranes a lot recently and wanted to do something with them.