The disagreement goes on for a few hours until they decide to hold a contest to determine the winner. They ask God to be the judge.

They set themselves before their computers and begin. They type furiously, lines of code streaming up the screen, for several hours straight. However, seconds before the end of the competition, a bolt of lightning strikes taking our the electricity. Moments later the power is restored and God announces that the contest is over. 

He asks Satan to show what he has come up with. Satan is visibly shaken and cries, "I have nothing. I lost it all when the power went out." 

"Very well then," says God, "Let us see if Jesus fared any better."

Jesus enters a command and the screen comes to life in a vivid display of graphics and colors, and the voices of an angelic choir pour forth from the speakers. 

Satan is astonished. He stutters, "B-b-but how? I lost everything, yet Jesus' program is intact! How did he do it?"

God chuckles and says, "Everybody knows... JESUS SAVES."