etnbrd/flx-compiler

digraph G {
  rankdir=LR;
  pad=1;

  graph [ fontname="HelveticaNeue-Thin", fontcolor=black, fontsize=20 ];
  node [ fontname="HelveticaNeue-Thin", fontcolor=black, fontsize=20, penwidth=0.5 shape=circle, fixedsize=true, width=1.2, height=1.2 ];
  edge [ fontname="HelveticaNeue-Thin", fontcolor=black, fontsize=20, penwidth=0.5 splines="ortho", arrowsize=0.7 ];
  
  {
    router -> worker [label="① M<addr> {message body}"];
    router -> worker [label="② M<addr> {message body}" dir="back"];
  }
}