Whoa. Can you imagine something that has not been created? You and I were created. The flowers and the trees were also created. Your cute little pup or kitten was created. God created these things for us to enjoy.
But no one or thing created God. God has always been here. He never had a birthday or a starting point. There is nothing bigger than God is. Plus, He has always been in existence.
Think of a point in time. Think of a point in eternity past, like 5 trillion years ago. God was in existence then, not that eternal things are measured in time. God was before that time period. Of course, time is not the same as eternity. Time was created for us, when God created the world.
Whatever point in time that we imagine, in eternity past, God was before that. No matter how far back we could go in our minds, God would still be before that. That’s because He has always been in existence. There was never a time when He did not exist. Not even in eternity past.