Does the plate have round shape?
No, the plate is square.
   src        edge_attr  dst
0    1   to the left of    5
1    1   to the left of    2
2    2  to the right of    5
3    2  to the right of    4
4    2  to the right of    1
5    4   to the left of    2
6    5   to the left of    2
7    5  to the right of    1