digraph G
{
    rankdir = LR

    node
    [
        fontname    = "Inconsolata"
        fontsize    = 22
        shape       = record
        style       = rounded
    ]

    edge
    [
        fontname    = "Inconsolata"
        fontsize    = 20
        arrowhead   = vee
        arrowtail   = vee
    ]

    "user\nagents" -> "your\napp" [label="PSGI",dir=both,fontcolor=blue,fontsize=30]
}