Clouds above... Clouds below... It had always been so. There was no sun, it just got brighter and darker in the layers of clouds. There was no ground or at least none had returned from the depths to describe it. The tribe would not even have the words for these things. The green stone floated in the high levels where the wind swept and crashed and the swift deadly darters flew. The blue stone floated in the lower level where the dark giants hunted and the lightning flashed. The only place for men was the mid level. The only way to live there was to catch the green out of the sky and the blue out of the depths and tie them together so they balanced. And so the people lived generation after generation in the middle air.