digraph {
nodesep = 0.5;
node [shape = circle, label = "", height = 0.3];
"0" -> "0" [label = "id 1\l4215k 50x", color = "black"] ;
"1" -> "1" [label = "id -1\l4215k 50x", color = "black"] ;
"2" -> "2" [label = "id 2\l84k 91x", color = "black"] ;
"3" -> "3" [label = "id -2\l84k 91x", color = "black"] ;
}