The existence of God is a matter of faith and belief, and there is no scientific proof that God exists. While some people may argue that there are scientific proofs for the existence of God, such as near-death experiences, light, time, and matter/energy, these arguments are not universally accepted by the scientific community. Some scientists have attempted to formalize the existence of God using mathematical theorems, but these arguments are not conclusive and are often debated. Ultimately, the existence of God is a matter of personal belief and cannot be proven or disproven by science.
You are looking at it from the wrong direction. Consider the complexity of the universe; we don't know it all, but what we know is exceedingly complex.
Then try to find a way that the universe could exist without God. You can't.
The universe is a complex machine made up of multitudes of smaller complex machines. Machines have makers. The Maker of the universe machine is great enough that He fits our definition of "God."
