I believe you were just experiencing something we "normal" people call "DUSK". Did the sun appear to be going down from the sky? If so, this is a "natural" occurence and should be no cause of alarm. Usually, during "DUSK", the sky may turn a hint of orange as it transitions from blue to black. I repeat, this is a "natural" occurence.
If you find this hard to understand, or feel threatened by this, feel free to run to the mountains, find a cave, and await for the end of the world.
Oh, were you expecting something here?