  We generalize the concept of folding from surface codes to CSS codes by
considering certain dualities within them. In particular, this gives a general
method to implement logical operations in suitable LDPC quantum codes using
transversal gates and qubit permutations only.
  To demonstrate our approach, we specifically consider a [[30, 8, 3]]
hyperbolic quantum code called Bring's code. Further, we show that by
restricting the logical subspace of Bring's code to four qubits, we can obtain
the full Clifford group on that subspace.
