In the Mayan Empire, on the 20th day of every month there would be a festival. Priests would walk up the stairs to thee temple/pyramid. On the stairs Mayans would wear masks and dance and rattle things which made a lot of much noise to show the demons that the priests were powerful and fierce. Bloodletting was part of the festival but it was a personal thing. When the Mayans did bloodletting they would cut themselves until 1 or 2 drops of blood would appear. Then there was human sacrifice, where the Mayans play a game against a couple o there captives and all the time the captives lost so they got sacrificed.