test.dot

digraph {
  rankdir=LR;
  size="8,5"
  node[shape=circle,label=""];
  0 [label="0
START
LOADK(A=r(2), Bx=1:0)
LOADK(A=r(3), Bx=2:1)
LOADK(A=r(4), Bx=4:2)
FORPREP(A=r(2), sBx=v(3))"];
  5 [label="5
CLOSURE(A=r(6), Bx=v(0))
MOVE(A=r(x:0), B=r(6))
JMP(A=v(6), sBx=v(0))"];
  8 [label="8
FORLOOP(A=r(2), sBx=v(-4))"];
  9 [label="9
RETURN(A=r(x:0), B=v(1))"];
  0 -> 5[label="fallthrough"];
  0 -> 8[label="jump"];
  5 -> 8[label="jump"];
  8 -> 5[label="jump"];
  8 -> 9[label="fallthrough"];
}