Shaking cannon

robot.js

//FightCode can only understand your robot
//if its class is called Robot
var go=120;
var Robot = function(robot) {};
Robot.prototype.onIdle = function(ev) {
  var robot = ev.robot;
  var clo =0
  robot.clone();  
  if(robot.parentId!=null){
  	robot.turn(30); 
    robot.back(100);
  }
    robot.rotateCannon(90);
  	robot = ev.robot;
  	if(.6>Math.random()){
      robot.rotateCannon(10);
   		 robot.ahead(go+clo);
      robot.turn(95);
    }
  
};

Robot.prototype.onScannedRobot = function(ev) {
  var sr = ev.scannedRobot;
  var robot = ev.robot;
    
  var bFriendly =  ( robot.parentId !=null && robot.parentId==sr.id);  
  bFriendly |= ( sr.parentId !=null && sr.parentId==robot.id);   
  
  if(bFriendly){
     robot.rotateCannon(30);
  	robot.back(20);
    
  }
  if(!bFriendly){
  	robot.fire();
    robot.fire();
    robot.rotateCannon(-15);
  	robot.fire();
    robot.fire();
 	 robot.rotateCannon(15);
    robot.fire();
    robot.fire();
    robot.rotateCannon(-15);

  }
};
Robot.prototype.onWallCollision= function(ev){
		var robot = ev.robot;
		//robot.ignore(onWallCollision);
  	go=go*-1;
  
  
  	robot.back(go);
    //robot.listen(onWallCollision);
  	robot.rotateCannon(-30);
  	robot.turn(30);
  	robot.back(go);
  	robot.rotateCannon(30);
    robot.back(go);
    robot.rotateCannon(-10);
    robot.back(go);
    

}
Robot.prototype.onHitByBullet = function(ev) {
    var robot = ev.robot;
   if(robot.parentId!=null){
   		robot.turnCannon(ev.bearing);
     robot.fire();
     robot.fire();
     robot.ahead(100);
     robot.fire();
    robot.ahead(100);
   }
};
Robot.prototype.onRobotCollision = function(ev) {
    var robot = ev.robot;
    robot.turn(45);
    robot.ahead(100); // trying to run away
};