Does the ceiling have a different color than the cup?
Yes, the cup is red and the ceiling is white.
    src        edge_attr  dst
0     0  to the right of    4
1     0   to the left of    2
2     0  to the right of   11
3     0  to the right of   15
4     1   to the left of    8
5     2  to the right of    0
6     2  to the right of    5
7     4               on    0
8     4   to the left of    0
9     4   to the left of    5
10    5  to the right of   15
11    5  to the right of   11
12    5  to the right of    4
13    5   to the left of    2
14    6   to the left of    8
15    7   to the left of   16
16    8  to the right of    6
17    8  to the right of    1
18    8  to the right of   12
19   10   to the left of   13
20   11               on    0
21   11   to the left of    0
22   11   to the left of    5
23   12   to the left of    8
24   13  to the right of   10
25   15   to the left of    5
26   15   to the left of    0
27   16  to the right of    7