graphviz

[gv]
digraph G {bgcolor="red:cyan" gradientangle=0

        subgraph cluster_0 {
                style=filled;
                color=lightgrey;
                fillcolor="blue:yellow";
                gradientangle=90;
                node [fillcolor="yellow:green" style=filled gradientangle=270] a0;
                node [fillcolor="green:red"] a1;
                node [fillcolor="red:cyan"] a2;
                node [fillcolor="cyan:blue"] a3;

                a0 -> a1 -> a2 -> a3;
                label = "process #1";
        }

        subgraph cluster_1 {
                node [fillcolor="yellow:magenta"
                         style=filled gradientangle=270] b0;
                node [fillcolor="magenta:cyan"] b1;
                node [fillcolor="cyan:red"] b2;
                node [fillcolor="red:blue"] b3;

                b0 -> b1 -> b2 -> b3;
                label = "process #2";
                color=blue
                fillcolor="blue:yellow";
                style=filled;
                gradientangle=90;
        }
        start -> a0;
        start -> b0;
        a1 -> b3;
        b2 -> a3;
        a3 -> a0;
        a3 -> end;
        b3 -> end;

        start [shape=Mdiamond ,
                fillcolor="yellow:brown",
                gradientangle=90,
                style=radial];
        end [shape=Msquare,
                fillcolor="orange:blue",
                style=radial,
                gradientangle=90];
}
[/gv]

[gv]digraph g {
graph [
rankdir = "LR"
bgcolor = "white:lightblue"
style="filled"
gradientangle = 270];
node [
fontsize = "16"
shape = "ellipse"
style="filled"
gradientangle=90
];
edge [
];
"node0" [
label = "<f0> 0x10ba8| <f1>"
shape = "record"
gradientangle="90"
fillcolor = "yellow:blue"
];
"node1" [
label = "<f0> 0xf7fc4380| <f1> | <f2> |-1"
shape = "record"
fillcolor = "blue:red"
gradientangle = 0
];
"node2" [
label = "<f0> 0xf7fc44b8| | |2"
shape = "record"
fillcolor = "brown:yellow"
gradientangle = 90
];
"node3" [
label = "<f0> 3.43322790286038071e-06|44.79998779296875|0 | <f1>"
shape = "record"
fillcolor = "green:red"
gradientangle = 90
];
"node4" [
label = "<f0> 0xf7fc4380| <f1> | <f2> |2"
shape = "record"
fillcolor = "red:green"
gradientangle = 0
];
"node5" [
label = "<f0> (nil)| | |-1"
shape = "record"
fillcolor = "red:red"
gradientangle = 90
];
"node6" [
label = "<f0> 0xf7fc4380| <f1> | <f2> |1"
shape = "record"
fillcolor = "orange:green"
];
"node7" [
label = "<f0> 0xf7fc4380| <f1> | <f2> |2"
shape = "record"
fillcolor = "cyan:green"
];
"node8" [
label = "<f0> (nil)| | |-1"
shape = "record"
fillcolor = "cyan:cyan"
];
"node9" [
label = "<f0> (nil)| | |-1"
shape = "record"
fillcolor = "orange:orange"
gradientangle = 90
];
"node10" [
label = "<f0> (nil)| <f1> | <f2> |-1"
shape = "record"
fillcolor = "magenta:green"
];
"node11" [
label = "<f0> (nil)| <f1> | <f2> |-1"
shape = "record"
fillcolor = "red:green"
];
"node12" [
label = "<f0> 0xf7fc43e0| | |1"
shape = "record"
fillcolor = "magenta:magenta"
];
"node0":f0 -> "node1":f0 [
id = 0
];
"node0":f1 -> "node2":f0 [
id = 1
];
"node1":f0 -> "node3":f0 [
id = 2
];
"node1":f1 -> "node4":f0 [
id = 3
];
"node1":f2 -> "node5":f0 [
id = 4
];
"node4":f0 -> "node3":f1 [
id = 5
];
"node4":f1 -> "node6":f0 [
id = 6
];
"node4":f2 -> "node10":f0 [
id = 7
];
"node6":f0 -> "node3":f1 [
id = 8
];
"node6":f1 -> "node7":f0 [
id = 9
];
"node6":f2 -> "node9":f0 [
id = 10
];
"node7":f0 -> "node3":f1 [
id = 11
];
"node7":f1 -> "node1":f0 [
id = 12
];
"node7":f2 -> "node8":f0 [
id = 13
];
"node10":f1 -> "node11":f0 [
id = 14
];
"node10":f2 -> "node12":f0 [
id = 15
];
"node11":f2 -> "node1":f0 [
id = 16
];
}

[/gv]