14 God said, “I command lights to appear in the sky and to separate day from night and to show the time for seasons, special days, and years.
15 I command them to shine on the earth.” And that's what happened.
16 God made two powerful lights, the brighter one to rule the day and the other to rule the night. He also made the stars.
17 Then God put these lights in the sky to shine on the earth,
18 to rule day and night, and to separate light from darkness. God looked at what he had done, and it was good.
19 Evening came, then morning—that was the fourth day.
20 God said, “I command the ocean to be full of living creatures, and I command birds to fly above the earth.”