The main program of Zao festival What are the processes

Worshiping the god of the stove is a custom from ancient times to the present day, because the stove is closely related to our lives, the god of the stove in ancient mythology is in charge of food and drink, and later on, it is the god of the order of the inspector of the good and evil on the earth, so since ancient times there has been the custom of worshiping the god of the stove. So Zao Festival what is the process of sacrificing to the god of the stove?