digraph HumanDefaultChoice {
    graph [goal="Ask for approval and use a default deployment choice on timeout"]
    rankdir=LR

    start [shape=Mdiamond, label="Start"]
    exit  [shape=Msquare, label="Exit"]

    approve [shape=hexagon, label="Approve deploy?", human.default_choice="deploy"]
    deploy  [shape=parallelogram, label="Deploy", script="echo deploy"]
    revise  [label="Revise", prompt="Revise the change for another approval pass"]

    start -> approve
    approve -> deploy [label="[D] Deploy"]
    approve -> revise [label="[R] Revise"]
    revise -> approve
    deploy -> exit
}