\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 (6) at (1, 0) {$6$};
	\node (5) at (10, 0) {$5$};
	\node (4) at (19, 0) {$4$};
	\node (3) at (25, 0) {$3$};
	\node (2) at (41, 0) {$2$};
	\node (1) at (44, 0) {$1$};

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