Vastu is based on direction and element. Half element zone and direction is partially colored, on the basis of which the whole Vastu depends. If we make even a slight mistake in it, then Vastu problem arises. If we use anti color in any zone, then a defect is created in that Vastu. If we place anti element in anti direction even by mistake, then that also creates Vastu defect. Element-zone - direction are linked to each other. This is all explained in this article.