\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 (1) at (9, 0) {$1$};
	\node (4) at (23, 0) {$4$};
	\node (3) at (25, 0) {$3$};
	\node (5) at (35, 0) {$5$};
	\node (6) at (42, 0) {$6$};

	\draw[double=white,draw=green] (6) -- (42, -16) -- (1, -16) -- (1, 15) -- (37, 15) -- (37, -12) -- (9, -12) -- (1);
	\draw[double=white,draw=blue] (4) -- (23, 6) -- (34, 6) -- (34, 0) -- (5);
	\draw[double=white,draw=red] (2) -- (0, 17) -- (38, 17) -- (38, -15) -- (2, -15) -- (2, 1) -- (10, 1) -- (10, -7) -- (25, -7) -- (3);
	\draw[double=green] (3) -- (25, 2) -- (21, 2) -- (21, -10) -- (48, -10) -- (48, 19) -- (6, 19) -- (6, -3) -- (13, -3) -- (13, 11) -- (33, 11) -- (33, -1) -- (36, -1) -- (36, 13) -- (11, 13) -- (11, -1) -- (8, -1) -- (8, 16) -- (46, 16) -- (46, -8) -- (23, -8) -- (4);
	\draw[double=blue] (5) -- (35, 12) -- (12, 12) -- (12, -2) -- (7, -2) -- (7, 18) -- (47, 18) -- (47, -9) -- (22, -9) -- (22, 1) -- (24, 1) -- (24, -1) -- (26, -1) -- (26, 3) -- (20, 3) -- (20, -11) -- (49, -11) -- (49, 20) -- (5, 20) -- (5, -4) -- (14, -4) -- (14, 10) -- (32, 10) -- (32, -2) -- (39, -2) -- (39, 2) -- (44, 2) -- (44, -6) -- (28, -6) -- (28, 5) -- (18, 5) -- (18, -14) -- (51, -14) -- (51, 22) -- (3, 22) -- (3, -6) -- (16, -6) -- (16, 8) -- (30, 8) -- (30, -4) -- (41, -4) -- (41, 0) -- (6);
	\draw[double=red] (1) -- (9, 14) -- (45, 14) -- (45, -7) -- (27, -7) -- (27, 4) -- (19, 4) -- (19, -13) -- (50, -13) -- (50, 21) -- (4, 21) -- (4, -5) -- (15, -5) -- (15, 9) -- (31, 9) -- (31, -3) -- (40, -3) -- (40, 1) -- (43, 1) -- (43, -5) -- (29, -5) -- (29, 7) -- (17, 7) -- (17, -8) -- (0, -8) -- (2);
\end{tikzpicture}
\end{document}