The creation of sacred works is important in Vodou. Drawings known as "vèvè" are sketched onto the floor of the peristil using cornmeal, ash, coffee grounds, or powdered eggshells. Usually arranged symmetrically around the poteau-mitan, these designs sometimes incorporate letters; their purpose is to summon lwa. Inside the peristil, practitioners also unfurl sequined ceremonial flags known as "drapo" (flags) at the start of a ceremony. Often made of silk or velvet and decorated with shiny objects, these drapo are understood as points of entry through which the lwa can enter the peristil.