  I present an extensible experimental design for optical continuous-variable
cluster states of arbitrary size using four offline (vacuum) squeezers and six
beamsplitters. This method has all the advantages of a temporal-mode encoding
[Phys. Rev. Lett. 104, 250503], including finite requirements for coherence and
stability even as the computation length increases indefinitely, with none of
the difficulty of inline squeezing. The extensibility stems from a construction
based on Gaussian projected entangled pair states (GPEPS). The potential for
use of this design within a fully fault tolerant model is discussed.
