static void Main(string[] args)
{
BaseLight light = new RedLight();
LightContext context = new LightContext();
context.CurrentLight = light;
context.Show();
context.Turn();
context.Show();
context.Turn();
context.Show();
context.Turn();
Console.ReadLine();
}
public override void TurnContex(LightContext context)
{
context.CurrentLight = new GreenLight();
}
public abstract void TurnContex(LightContext context);