DEF Illuminator Script {
      eventIn SFBool turn_on
      eventOut SFBool light_changed
      url [ "javascript:
	function turn_on (value) {
	  if (value) {
	    light_changed = true;
	  }
	}
    " ]
    }
  ]
  ROUTE Sensor1.isActive TO Illuminator.turn_on
  ROUTE Illuminator.light_changed TO Light1.set_on
}