Mafia members silently agree on a citizen to kill. They point out this person so that God understands, and go back to sleep. At daybreak, God reports to the people who is dead. That person can silently observe the rest of the game or go out for ice cream, as he or she pleases. Days end with an execution by the citizens.
Nights end with a slaughter by the mafia.
Two Simple Rules Think, don't listen. It is unfair for players to try to detect sound or motion from Mafia members during the night. The game is about making decisions based on discussions, not clever surreptitiousness. This is Mafia, not Ghosts. Cheat if you want to, but it's not as fun.