\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 (1, 0) {$2$};
	\node (5) at (18, 0) {$5$};
	\node (6) at (35, 0) {$6$};
	\node (1) at (39, 0) {$1$};
	\node (4) at (49, 0) {$4$};
	\node (3) at (68, 0) {$3$};

	\draw[double=white,draw=green] (2) -- (1, -17) -- (46, -17) -- (46, 3) -- (52, 3) -- (52, -5) -- (72, -5) -- (72, 23) -- (19, 23) -- (19, -1) -- (16, -1) -- (16, 26) -- (74, 26) -- (74, -10) -- (50, -10) -- (50, 1) -- (48, 1) -- (48, -14) -- (76, -14) -- (76, 32) -- (3, 32) -- (3, -14) -- (40, -14) -- (40, 10) -- (67, 10) -- (67, 0) -- (3);
	\draw[double=white,draw=blue] (6) -- (35, -1) -- (39, -1) -- (1);
	\draw[double=white,draw=red] (4) -- (49, -11) -- (75, -11) -- (75, 31) -- (4, 31) -- (4, -13) -- (31, -13) -- (31, 15) -- (69, 15) -- (69, -1) -- (66, -1) -- (66, 4) -- (45, 4) -- (45, -16) -- (2, -16) -- (2, 33) -- (77, 33) -- (77, -16) -- (47, -16) -- (47, 2) -- (51, 2) -- (51, -7) -- (73, -7) -- (73, 25) -- (17, 25) -- (17, 0) -- (5);
	\draw[double=green] (5) -- (18, 16) -- (57, 16) -- (57, -6) -- (38, -6) -- (38, 3) -- (30, 3) -- (30, -12) -- (5, -12) -- (5, 30) -- (71, 30) -- (71, -3) -- (64, -3) -- (64, 24) -- (9, 24) -- (9, -8) -- (26, -8) -- (26, 7) -- (43, 7) -- (43, -2) -- (54, -2) -- (54, 12) -- (22, 12) -- (22, -4) -- (13, -4) -- (13, 19) -- (60, 19) -- (60, -12) -- (34, -12) -- (34, 0) -- (6);
	\draw[double=blue] (3) -- (68, 28) -- (7, 28) -- (7, -10) -- (28, -10) -- (28, 5) -- (41, 5) -- (41, -4) -- (56, -4) -- (56, 14) -- (20, 14) -- (20, -2) -- (15, -2) -- (15, 17) -- (58, 17) -- (58, -8) -- (37, -8) -- (37, 2) -- (32, 2) -- (32, -15) -- (62, -15) -- (62, 21) -- (11, 21) -- (11, -6) -- (24, -6) -- (24, 9) -- (49, 9) -- (4);
	\draw[double=red] (1) -- (39, 4) -- (29, 4) -- (29, -11) -- (6, -11) -- (6, 29) -- (70, 29) -- (70, -2) -- (65, -2) -- (65, 27) -- (8, 27) -- (8, -9) -- (27, -9) -- (27, 6) -- (42, 6) -- (42, -3) -- (55, -3) -- (55, 13) -- (21, 13) -- (21, -3) -- (14, -3) -- (14, 18) -- (59, 18) -- (59, -9) -- (36, -9) -- (36, 1) -- (33, 1) -- (33, -13) -- (61, -13) -- (61, 20) -- (12, 20) -- (12, -5) -- (23, -5) -- (23, 11) -- (53, 11) -- (53, -1) -- (44, -1) -- (44, 8) -- (25, 8) -- (25, -7) -- (10, -7) -- (10, 22) -- (63, 22) -- (63, -18) -- (0, -18) -- (0, 0) -- (2);
\end{tikzpicture}
\end{document}