1 John 1:5 - "This is the message we have heard from him and declare to you: God is light; in him there is no darkness at all." I suggest that you're off on the wrong foot by thinking of God as 'creating' good and evil. He is Yahweh (or however you choose to express that) - everything in existence depends on God, who is good. This idea of light and darkness is a helpful one - evil is like the absence of light. Evil will come to nothing finally, because it is nothing.