static void Main(string[] args)
{
SimulateDuck(new MallardDuck());
SimulateDuck(new RedHeadDuck());
SimulateDuck(new RubberDuck());
SimulateDuck(new DecoyDuck());
SimulateDuck(new ModelDuck());
Duck duck = new MallardDuck();
duck.Fly();
duck.Fly();
duck.SetFlight(FlyBehaviour.FlyWithWings());
duck.Fly();
}