vectorToFrom (Point x0 y0) (Point x1 y1) = Vector (x0 - x1) (y0 - y1)
vectorToFrom (Point x0 y0) (Point x1 y1) = Vector (x0 - x1) (y0 - y1)
vectorToFrom (Point x0 y0) (Point x1 y1) = Vector (x0 - x1) (y0 - y1)