\documentclass{standalone}
\usepackage[paperwidth=\maxdimen,paperheight=\maxdimen]{geometry}
\usepackage{pgf,tikz}
\begin{document}

\begin{tikzpicture}[x=24pt, y=24pt, draw=white, double=black, line width=2.1pt]
	\node (2) at (0, 0) {$2$};
	\node (3) at (5, 0) {$3$};
	\node (4) at (9, 0) {$4$};
	\node (5) at (12, 0) {$5$};
	\node (6) at (16, 0) {$6$};
	\node (1) at (21, 0) {$1$};

	\draw[double=white,draw=green] (2) -- (0, -2) -- (7, -2) -- (7, 8) -- (23, 8) -- (23, -2) -- (19, -2) -- (19, 1) -- (15, 1) -- (15, -4) -- (25, -4) -- (25, 11) -- (4, 11) -- (4, 0) -- (3);
	\draw[double=white,draw=blue] (4) -- (9, 6) -- (22, 6) -- (22, -1) -- (20, -1) -- (20, 3) -- (12, 3) -- (5);
	\draw[double=white,draw=red] (6) -- (16, -3) -- (24, -3) -- (24, 10) -- (6, 10) -- (6, -1) -- (3, -1) -- (3, 12) -- (27, 12) -- (27, -5) -- (10, -5) -- (10, 5) -- (21, 5) -- (1);
	\draw[double=green] (3) -- (5, 2) -- (13, 2) -- (13, -1) -- (9, -1) -- (4);
	\draw[double=blue] (5) -- (11, 0) -- (11, 1) -- (8, 1) -- (8, -2) -- (18, -2) -- (18, 2) -- (26, 2) -- (26, -7) -- (1, -7) -- (1, 7) -- (16, 7) -- (6);
	\draw[double=red] (1) -- (21, -6) -- (2, -6) -- (2, 4) -- (14, 4) -- (14, -1) -- (17, -1) -- (17, 9) -- (0, 9) -- (2);
\end{tikzpicture}
\end{document}