example.dot

digraph {
  bgcolor="black"

  g [color="yellow" fontcolor="yellow" fontname="monospace"]
  p [color="yellow" fontcolor="yellow" fontname="monospace"]
  n [color="yellow" fontcolor="yellow" fontname="monospace"]
  l [color="yellow" fontcolor="yellow" fontname="monospace"]
  r [color="yellow" fontcolor="yellow" fontname="monospace"]

  g -> p [color="yellow" fontcolor="yellow" fontname="monospace"]
  p -> n [color="yellow" fontcolor="yellow" fontname="monospace" label="n⊕g"]
  n -> l [color="yellow" fontcolor="yellow" fontname="monospace" label="l⊕p"]
  n -> r [color="yellow" fontcolor="yellow" fontname="monospace" label="r⊕p"]
}