digraph{
    graph [
        bgcolor="#FFFFFFF00",
        rankdir=LR,
        ];
    released1 [label=released];
    released2 [label=released];
    released1 -> waiting;
    waiting -> processing;
    waiting -> "no-worker";
    waiting -> queued;
    "no-worker" -> processing;
    queued -> processing;
    processing -> memory;
    processing -> error;
    error -> released2;
    memory -> released2;
    released2 -> forgotten;
}
