\input{./vars}

\begin{document}
\begin{tikzpicture}[node distance = 3cm, auto]
  \node [block] (init) {\footnotesize Mix ingredients};
  \node [block, below of=init, node distance=3cm] (bulk_ferment) {\footnotesize Bulk ferment};
  \node [block, right of=init, node distance=3cm] (divide) {\footnotesize Divide};
  \node [block, below of=divide, node distance=3cm] (shape) {\footnotesize Shape};
  \node [block, right of=divide, node distance=3cm] (proof) {\footnotesize Proof};
  \node [block, below of=proof, node distance=3cm] (bake) {\footnotesize Bake};
  \path [line] (init) -- (bulk_ferment);
  \path [line] (bulk_ferment) -- (divide);
  \path [line] (divide) -- (shape);
  \path [line] (shape) -- (proof);
  \path [line] (proof) -- (bake);
\end{tikzpicture}
\end{document}