/doc/images/manual_dependencies_flowchart2.dot

 1digraph tree
 2{
 3size="8,11!";
 4splines=true;
 5fontsize=30;
 6ranksep = 0.1;
 7subgraph clustertasks
 8{
 9label = "Pipeline:";
10edge[minlen=2];
11node[fontsize=20];
12t0[style=filled, color=olivedrab, label="task1", shape=octagon, fillcolor=olivedrab, fontcolor=black];
13t1[style=filled, color=olivedrab, label="task2", shape=octagon, fillcolor=olivedrab, fontcolor=black];
14t0 -> t1[color=gray, arrowtype=normal];
15t2[style=filled, color=olivedrab, label="task3", shape=octagon, fillcolor=olivedrab, fontcolor=black];
16t1 -> t2[color=gray, arrowtype=normal];
17t3[color=gray, fontcolor=gray, shape=tripleoctagon, label="task4"];
18t2 -> t3[color=gray, arrowtype=normal];
19}
20}