Ok, someone who watches anime help me out here. I'm trying to figure out whether this was an actual anime or if it is just a dream I'm remembering.
I don't remember all or even much of it, I just know the main character was a little girl. And she was living in some sort of world where all the people were disappearing? And then you find out that all the people are turning into these grey semi-people shaped blocks, which in turn are forming a large wall.
I remember it being really really sad, too. But that's about all I've got. Any ideas?
I have no idea what it might be called if it exists. But I probably would have watched it about 10 years ago? And it was probably older at the time, already.