graph G {
    compound="true"
    rankdir="TB"
    bgcolor="white"
    fontname="Tahoma"

    node [
        fixedsize="false"
        fontname="Tahoma"
        color="white"
        fillcolor="deepskyblue2"
        fontcolor="black"
        shape="box"
        style="filled"
        penwidth="1.0"
    ]
    edge [
        fontname="Arial"
        color="#00688b"
        fontcolor="black"
        fontsize="12"
        arrowsize="0.5"
        penwidth="1.0"
    ]

    "py (8)" [fillcolor="deepskyblue2"];
    "html (10)" [fillcolor="deepskyblue2"];
    "java (44)" [fillcolor="deepskyblue2"];
    "xml (13)" [fillcolor="deepskyblue2"];
    "scala (20)" [fillcolor="deepskyblue2"];



    "java (44)" -- "scala (20)" [label=" 16 ", penwidth="10", color="#00688bFF"];
    "java (44)" -- "xml (13)" [label=" 13 ", penwidth="8", color="#00688bDB"];
    "scala (20)" -- "xml (13)" [label=" 7 ", penwidth="4", color="#00688b93"];
    "java (44)" -- "html (10)" [label=" 6 ", penwidth="3", color="#00688b82"];
    "java (44)" -- "py (8)" [label=" 4 ", penwidth="2", color="#00688b70"];
    "scala (20)" -- "py (8)" [label=" 2 ", penwidth="1", color="#00688b5E"];
    "html (10)" -- "py (8)" [label=" 2 ", penwidth="1", color="#00688b5E"];
    "xml (13)" -- "py (8)" [label=" 2 ", penwidth="1", color="#00688b5E"];
    "scala (20)" -- "html (10)" [label=" 1 ", penwidth="1", color="#00688b4C"];
    "xml (13)" -- "html (10)" [label=" 1 ", penwidth="1", color="#00688b4C"];

}