"during the month of Mac, dedicated to Chac, the god of rain, the slaves or children who were going to be sacrificed, were stripped naked and their bodies smeared with blue paste. If they were to get their hearts out, they were taken to the sacrificial stone painted blue, and the priest and his assistants smeared that stone with blue. In addition, there was a small altar, very clean, and whose first step was smeared with mud from the well (cenote), while the other steps were painted in that color"