The sky darkens, as if a great raven has opened it's wings over the horizon. Shades of grey, wisp off its edges, dancing and wreathing through the evening air.
The wind begins to cry a eerie song. As though lamenting for the heavens it is engulfing into its inky figure.
The purple and blue hues absorbed into its periphery, becoming mournfully darker blue.
Then the blackness, as if to be