article_snippet: The masks and bells are said to warn off evil spirits that take the form of snakes and lizards .
article_snippet: The evil spirits are said to be in the form of snakes and lizards who emerge on this day.
article_snippet: Rituals take place, fires are burnt and the houses are cleaned to banish these negatives.
article_snippet: Rituals take place, fires are burnt and the houses are cleaned to banish 'evil spirits' which take the form of snakes and lizards .