\begin{tikzpicture}
	\begin{pgfonlayer}{nodelayer}
		\node [style=black node] (0) at (0, 0) {};
		\node [style=black node] (1) at (-2, 0) {};
		\node [style=black node] (2) at (-4, 0) {};
		\node [style=black node] (3) at (0, 2) {};
		\node [style=black node] (4) at (2, 0) {};
		\node [style=black node] (5) at (4, 0) {};
		\node [style=black node] (6) at (6, 0) {};
		\node [style=black node] (7) at (8, 0) {};
		\node [style=black node] (8) at (10, 0) {};
		\node [style=white node] (9) at (12, 0) {};
	\end{pgfonlayer}
	\begin{pgfonlayer}{edgelayer}
		\draw (2) to (1);
		\draw (1) to (0);
		\draw (0) to (4);
		\draw (4) to (5);
		\draw (5) to (6);
		\draw (6) to (7);
		\draw (7) to (8);
		\draw (3) to (0);
		\draw [style=double edge] (8) to (9);
	\end{pgfonlayer}
\end{tikzpicture}
