Soon after that, the sky grew dark and I thought we were in for a summer storm. Gradually, though, it cleared up again. But the passing clouds had left a hint of rain hanging over the street, which made it look darker. I sat there for a long time and watched the sky. (1.2.8-10)
The sky changed again. Above the rooftops the sky had taken on a reddish glow, and with evening coming on the streets came to life.
Then the street lamps came on all of a sudden and made the first stars appearing in the night sky grow dim. I felt my eyes getting tired. (1.2.11)
The sky was green; I felt good. (1.3.3)