digraph scytherflow {

  subgraph normal {

    spdl [label="protocol description",shape=box,];
    scyther [shape=box,label="Scyther",style=bold,fontsize=18];
    summary [label="text summary\nof the results",shape=box];
    spdl -> scyther [style=bold,weight=10.0];
    scyther -> summary [style=bold,weight=10.0];

  }

}