Bounded by the yods at its three corners, which form an equilateral triangle, the tetractys has six 'hexagonal yods' surrounding its centre that are arranged at the corners of a hexagon or, equivalently, at the tips of a Star of David. They lie on the circumferences of six circles whose centres or points of contact with one another or with the central circle are the locations of the white circles symbolizing the 10 Sephiroth of the Tree of Life. It can therefore be said that the tetractys generates the latter.