[Tutor] the Existence of Light and Darkness

In this world, where there is light, there must be darkness. This is the principle of all things, even the third power of seven. He is the inheritor of light, but he is also the owner of darkness! He saw his future in countless parallel worlds! He personally planned a play to test his guardians. If they passed, then no matter what the future holds, he would still be the successor of light. If they failed, then he would abandon everything and return to the existence of darkness. Only when the sky is dyed red by the setting sun will it become the night sky! However, no one noticed that no matter how much the sky changed, it was still the sky.