Most people think that in Genesis 1 God created light, God created the land and the seas, God created plant life, God created the sun and the moon ... etc.
If you will read Genesis 1 carefully, that's not what it says. In verse 1, God created the heaven and the earth. In verse 21 God created "the great crocodiles (interesting translation), and every living creature that moves ...And in verse 27 God created Mankind in his image.The definition of 'create' I learned many years ago was 'to bring into existence something which had never before existed.'
In verse 3 God said, Let there be light. So whatever light consisted of had already been in existence before, but had been destroyed in the war between verse 1 and verse 2.
In verse 6 God said, Let there be a firmament in the midst of the waters. Nothing new had to be created for this.
In verse 9 God said Let the waters under the heaven be gathered together. So in verse 6 and 9, day 2 and the first part of day 3, God just rearranged what was already created and brought forth by His Words.
In verse 11 God said Let the earth bring forth grass ... He formed plant life. But He didn't create anything here. So these things also must have existed in the First Heaven and Earth.
In verse 14 God said, Let there be lights in the firmament of heaven. And the sun and the moon and the stars were set in their place and set in their courses. Plant life needed light, but not the light of the sun and the moon on that first day of life.
In verse 20 God said Let the water swarm abundantly with moving creatures that have life, and let birds fly above the earth in the open firmament of heaven. And the waters and the skies above were populated.
In verse 24 God said, Let the earth bring forth living creatures after their kind, cattle, and creeping things, and beasts of the earth after their kind, and cattle after their kind, and everything that creeps on the earth after its kind. And the lands were populated.
In verse 26 God said,Let us make Mankind in our image, after our likeness: and let them have dominion over the fish of the sea and over the birds of the air, and over the cattle, and over all the earth, and over every creeping thing that creeps on the earth, 27 So God created Mankind in his own image, in the image of God he created him: male and female he created them.
Finally God creates something new! What is the "image of God"? God is spirit (Jn 4:4). He does not have a physical body. What God created on the sixth day is a man with spirit. (Unfortunately, Adam and Eve gave up that spirit in the Garden of Eden when they chose to disobey God's only commandment.)