// Behavior.
automaton def Lamp():
  event toggle;
  disc bool on = false;

  location:
    initial;
    edge toggle do on := not on;
end

lamp1: Lamp();
lamp2: Lamp();

// Visualization.
svgfile "lamps2.svg";

svgout id "lamp1" attr "fill" value if lamp1.on: "yellow" else "silver" end;
svgout id "lamp2" attr "fill" value if lamp2.on: "yellow" else "silver" end;

svgout id "lamp1" attr "stroke-width" value if lamp1.on: 5 else 2 end;
svgout id "lamp2" attr "stroke-width" value if lamp2.on: 5 else 2 end;