To avenge yourself against your enemies, light four joss sticks in a joss stick burner. Do not light them, however, at your regular altar but at a separate, smaller altar with an image of a war god or goddess. This altar should be located near a window or a door so that the smoke from the joss sticks will waft outside rather than inside your house.

No special rituals or prayers are required, Just light four joss sticks, keeping in mind the corollaries:

--If only three sticks light up, you must first light three sticks at your regular altar.
--If only two sticks light up, your enemy(ies) is (are) in need of prayers. rather than revenge.
--If only one stick lights up, you are being called upon to make a good wish for yourself.