Noah was a righteous man amongst the corrupted in his generations. During the flood, he was kept safe along with the animals in the ark, for he had found favour in God’s eyes. When the flood was over, God made a rainbow appear and promised Noah that He would not destroy the earth again.
Jesus is depicted dying on the Cross for our sins. In my opinion, it was dark when Jesus was crucified. The darkness signifies their cruelty towards Him as they did not know that He was the Son of God.
From painting Heaven and hell, I found a disgusting and tempting face of the evil one. Men will tend to look heavenward when at a crossroad of great temptation, but the Bible already told us that God will make a way for those who trust in Him till the end.