The heavens and the earth. The sun, moon, and stars. All of the oceans, seas, lakes, and streams. All of the mountains, valleys, and deserts. All trees, flowers, and creatures great and small. Mankind.
God didn't have to keep moving things around to see if they fit or not. Testing, testing, testing. He had a plan. He knew exactly what He wanted, and He just did it. Perfectly. From the very beginning. Every little detail. He didn't forget a single thing. The greatest artist of all, "God saw that it was good." (Genesis 1)
And then...He rested.