graph G {
    node [ shape=box, fontcolor="#ffffff", color="#40a9e3", style="filled"  ]

    label="The IPv6 eye"

    subgraph cluster_sample {
        wired [ label="Wired Internet" ]
        wifi  [ label="WiFi Internet" ]
        modem0  [ label="4G Internet" ]
        ipv6vpn [ label="IPv6VPN.ch" shape=oval ]

        label="Any eye"

        eye0 [ label="Eye Base" ]

    }

    subgraph cluster_regular {
        label="The eye"

        eye1 [ label="Eye Base" ]
        cam1 [ label="USB Camera" ]
        eye1--cam1

    }

    eye0--{wifi,wired,modem0} [ style=dotted  ]
    {wired,wifi,modem0}--ipv6vpn  [ style=dotted  ]


    subgraph cluster_auto {
        label="The autonomous eye"

        eye2 [ label="Eye Base" ]
        usb2 [ label="USB Hub" ]
        cam2 [ label="USB Camera" ]
        modem2 [ label="4G modem" ]
        bat2 [ label="Battery" ]

        eye2--usb2
        usb2--cam2
        usb2--modem2
        bat2--eye2
    }

    subgraph cluster_fully_auto {
        label="The fully autonomous eye"

        eye3 [ label="Eye Base" ]
        usb3 [ label="USB Hub" ]
        cam3 [ label="USB Camera" ]
        modem3 [ label="4G modem" ]
        bat3 [ label="Battery" ]
        solar3 [ label="Solar Panel" ]

        eye3--usb3
        usb3--cam3
        usb3--modem3
        solar3--bat3
        bat3--eye3
    }



    subgraph cluster_car {
        label="The car eye"

        eye4 [ label="Eye Base" ]
        usb4 [ label="USB Hub" ]
        cam4 [ label="USB Camera" ]
        modem4 [ label="4G modem" ]
        carusb4 [ label="Car USB Charger" ]

        eye4--usb4
        usb4--cam4
        usb4--modem4
        carusb4--eye4
    }

}