\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 (1) at (0, 0) {$1$};
	\node (4) at (5, 0) {$4$};
	\node (6) at (19, 0) {$6$};
	\node (5) at (35, 0) {$5$};
	\node (3) at (37, 0) {$3$};
	\node (2) at (56, 0) {$2$};

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