The tiles have what color?
The tiles are red.
    src        edge_attr  dst
0     0  to the right of   15
1     1        on top of    5
2     1   to the left of   15
3     2  to the right of    4
4     4   to the left of    2
5     6   to the left of   18
6     9   to the left of   16
7    10     hanging from   16
8    10  to the right of   13
9    10  to the right of   14
10   11  to the right of   19
11   13               on   14
12   13   to the left of   16
13   13   to the left of   10
14   14   to the left of   16
15   14   to the left of   10
16   15  to the right of    1
17   15   to the left of    0
18   16  to the right of   13
19   16  to the right of   14
20   16  to the right of    9
21   17  to the right of   19
22   18               on   11
23   18  to the right of    6
24   19               on    3
25   19   to the left of   11
26   19   to the left of   17