digraph execute {
    layout = fdp
    graph [fontname = Verdana rankdir = LR]
    node [shape = none]
    start [
    label = <<table width="70" border="0" cellpadding="7" bgcolor="lightgreen"><tr align="left"><td>start()</td></tr></table>>
    pos = "0,0!"
    fixedsize = shape

    ]

    process [
    label = <<table width="70" border="0" cellpadding="7" bgcolor="lightgreen"><tr align="left"><td>process()</td></tr></table>>
    pos = "0,-1!"
    ]

    finish [
    label = <<table width="70" border="0" cellpadding="7" bgcolor="lightgreen"><tr align="left"><td>finish()</td></tr></table>>
    pos = "0,-2!"
    ]

    start -> process -> finish
}
