In the third roundel, God separated the elements into

earth - the red circle

water - the wavy blue lines

and air - the dark blue arc above lined with clouds

to create the world.

Genesis 1: 6-10

6 And God said, “Let there be a vault between the waters to separate water from water.” 7 So God made the vault and separated the water under the vault from the water above it. And it was so. 8 God called the vault “sky.” And there was evening, and there was morning—the second day. 9And God said, “Let the water under the sky be gathered to one place, and let dry ground appear.” And it was so. 10 God called the dry ground “land,” and the gathered waters he called “seas.” And God saw that it was good.