Does the door have the same color as the pipe?
Yes, both the door and the pipe are black.
    src        edge_attr  dst
0     2  to the right of    9
1     3  to the right of    6
2     3   to the left of   11
3     3            below    8
4     4   to the left of   12
5     4   to the left of   14
6     5   to the left of   13
7     6   to the left of    3
8     8            above    3
9     9   to the left of    2
10   10   to the left of   14
11   10   to the left of   12
12   11  to the right of    3
13   12  to the right of   10
14   12  to the right of    4
15   13               on   16
16   13  to the right of    5
17   14  to the right of   10
18   14  to the right of    4
19   15   to the left of   16
20   16  to the right of   15