What color do you think are the tiles on the wall?
The tiles are blue.
    src        edge_attr  dst
0     0  to the right of    9
1     0  to the right of    5
2     2   to the left of    7
3     2  to the right of   14
4     2   to the left of    3
5     2  to the right of   10
6     2  to the right of    9
7     3  to the right of    2
8     3               on    2
9     5   to the left of    0
10    5   to the left of   11
11    7  to the right of    2
12    9   to the left of    2
13    9   to the left of    0
14    9   to the left of   11
15   10   to the left of   13
16   10   to the left of   12
17   10   to the left of    2
18   10   to the left of   14
19   11  to the right of    9
20   11  to the right of    5
21   12  to the right of   10
22   13  to the right of   10
23   14               on    9
24   14  to the right of   10
25   14   to the left of    2