automaton lamp1:
  event toggle;
  disc bool on = false;
  svgcopy id "lamp" post "1";
  svgmove id "lamp1" to 20, 20;
  svgout id "lamp1" attr "fill" value if on: "yellow" else "silver" end;
  svgout id "lamp1" attr "stroke-width" value if on: 5 else 2 end;
  location:
    initial;
    edge toggle do on := not on;
end
automaton lamp2:
  event toggle;
  disc bool on = false;
  svgcopy id "lamp" post "2";
  svgmove id "lamp2" to 120, 20;
  svgout id "lamp2" attr "fill" value if on: "yellow" else "silver" end;
  svgout id "lamp2" attr "stroke-width" value if on: 5 else 2 end;
  location:
    initial;
    edge toggle do on := not on;
end
automaton lamp3:
  event toggle;
  disc bool on = false;
  svgcopy id "lamp" post "3";
  svgmove id "lamp3" to 220, 20;
  svgout id "lamp3" attr "fill" value if on: "yellow" else "silver" end;
  svgout id "lamp3" attr "stroke-width" value if on: 5 else 2 end;
  location:
    initial;
    edge toggle do on := not on;
end
svgfile "lamps3.svg";