In
Voodoo rituals, the vévé is a pattern drawn on the ground to aid in calling forth the
loa, or
spirits. They are most frequently drawn in cornmeal (and sometimes partially eaten beforehand by the
animal sacrifice), but other
substances such as flour, ash, or even
coffee grounds may be used. They tend to be much more
elaborate than your typical
pentagram.
The vévé is a symbolic pathway or road on which the loa travels between the two worlds. Each loa has its own unique vévé.