Is the color of the hill different than the collar?
No, both the hill and the collar are white.
    src        edge_attr  dst
0     0  to the right of   14
1     2     covered with    1
2     4  to the right of   14
3     6   to the left of   17
4     6   to the left of   11
5     6   to the left of   15
6     7  to the right of   14
7     7  to the right of   10
8     9  to the right of   14
9    10   to the left of    7
10   10  to the right of   14
11   11  to the right of   17
12   11  to the right of    6
13   12  to the right of   14
14   14   to the left of   16
15   14   to the left of    7
16   14   to the left of   10
17   14   to the left of    9
18   14   to the left of   12
19   14   to the left of    0
20   14   to the left of    4
21   15          wearing    3
22   15  to the right of    6
23   15          wearing   17
24   16  to the right of   14
25   17   to the left of   11
26   17  to the right of    6