Five regular geometric solid bodies from concrete on a nickel and lead-free necklace. The five regular bodies are called THODI. For thousands of years, humans have been attracted to form with symmetric harmony. Their beauty comes from their regularity and uniform proportions. The Greeks were the first, among the Platon, who stated that by understanding the laws of shapes we can describe the whole world. Greek geometry is based on the five perfect, Platonic Solids that are the building blocks of nature: fire, earth, air, the cosmos and water. Platonic Solids are convex bodies in space, all their angles and faces are the same. Suprisingly, it is only true for five solids: tetrahedron (4 faces), octahedron (8 faces), cube (6 faces), icosahedron (20 faces) and dodecahedron (12 faces). All Platonic Solids have a dual, the tetrahedron being special as its dual is itself. By laying down these geometric laws, the Greeks have discovered a piece of nature’s code.