Code: \tikzstyle{state} = [draw,circle split,node distance=2.5cm, minimum height=2em] \begin{tikzpicture}[node distance = 3cm, auto] % Place nodes \node (reset) {reset}; \node [state, below of=reset] (init) {000 \nodepart{lower} G/R}; \node [state, below of=init] (wait) {001 \nodepart{lower} G/R}; \node [state, below of=wait] (hrdy) {010 \nodepart{lower} Y/R}; \node [state, below of=hrdy] (hleft..