//FightCode can only understand your robot //if its class is called Robot var Robot = function(robot) { }; Robot.prototype.onIdle = function(ev) { var robot = ev.robot; robot.ahead(10); robot.turn(20); robot.ahead(10); robot.turn(20); robot.ahead(10); robot.turn(20); robot.ahead(10); robot.turn(20); //robot.rotateCannon(360); robot.back(100); robot.back(100); robot.rotateCannon(360); }; Robot.prototype.onScannedRobot = function(ev) { var robot = ev.robot; robot.fire(); };