Each Transformer string is created out of small building blocks, with 3x restricted hinges between 4x rigid macaroni shaped strings, based on only one ring shaped primordial tetrahedral shaped Axion particle.
Each Hing has 4x Hinge restricted rotational positions:
Right, O-round Left and U-up (R.O.L.U) see image.
The Ring shaped Axion Vacuum String is the only closed string and building block for the dual oscillating vacuum lattice in tetrahedral form.
Each Axion string can change into a photon by Fermion collision.
Each vacuum lattice is a double oscillating photon guide and can change (Planck) length around large masses and black holes as the origin of lensing effects.
The origin of photon fields is based on bunches of photon strings guided by the vacuum lattice. see:
Rigid String Cosmology with a Massless Axion-Higgs Oscillating Photon Vacuum Lattice and massive Quantum Knots.