What kind of device is illuminated?
The device is a screen.
    src        edge_attr  dst
0     0               on    2
1     0   to the left of    1
2     1   to the left of    7
3     1   to the left of    6
4     1  to the right of    2
5     1   to the left of    5
6     1  to the right of    0
7     2   to the left of    1
8     4   to the left of    7
9     5  to the right of    1
10    6               on    7
11    6  to the right of    1
12    7  to the right of    4
13    7  to the right of    1