digraph {
    Root [shape="point"]
    UserRoot [shape="point"]
    LastInput [shape="point"]
    NewInput [shape="point",color="green"]
    Value [label="__input__"]

    Root -> UserRoot [label="username"]
    UserRoot -> LastInput [label="'input'",color="blue",style="dashed"]
    LastInput -> NewInput [label="'next'",color="green",penwidth=4]
    UserRoot -> NewInput [label="'input'",color="green",penwidth=4]
    LastInput -> Value [label="'value'",color="green",penwidth=4]
}