Genesis 1:14-19
And God said, ÒLet there be lights in the expanse of the sky to separate the day from the night, and let them serve as signs to mark seasons and days and years.  And let them be lights in the expanse of the sky to give light upon the earth.Ó  And it was so.  God made two great lights Ð the greater light to dominate the day and the lesser light to dominate the night.  He also made the stars.  God set them in the expanse of the sky to give light on the earth, to dominate the day and the night, and to separate light from darkness.  And God saw that it was good.  And there was evening, and there was morning Ð a fourth day.