def add_polygon_filled(pic, point_list, col):
    """Draw an empty polygon of Color col with corners for every vertex
    in list point_list on Picture pic.

    Note:
    point_list is a list containing vertices xy coordinates
    (ex. [x1,y1,x2,y2,x3,y3]) It should contain at least
    three coordinate pairs."""
    pic.add_polygon_filled(col, point_list)
