'Darkness' in the Bible

Now the earth was formless and empty. Darkness was on the surface of the deep. God's Spirit was hovering over the surface of the waters.

God saw the light, and saw that it was good. God divided the light from the darkness.

God called the light "day," and the darkness he called "night." There was evening and there was morning, one day.

and to rule over the day and over the night, and to divide the light from the darkness. God saw that it was good.

When the sun was going down, a deep sleep fell on Abram. Now terror and great darkness fell on him.