public override void Update(float deltaTime)
 {
     ActionModel.Subject = null;
     foreach (TurtleModel turtle in TurtleModels)
     {
         if (turtle.Selected)
         {
             ActionModel.Subject = turtle;
             break;
         }
     }
     if (ActionModel.Subject != null)
     {
         ActionModel.Target = null;
         foreach (SeatModel seat in SeatModels)
         {
             if (seat.Selected && !seat.Position.Equals(ActionModel.Subject.Position))
             {
                 ActionModel.Target = seat;
                 break;
             }
         }
         if (ActionModel.Target != null)
         {
             // Conditions met for turtle move
             ActionModel.Subject.Selected = false;
             ActionModel.Target.Selected  = false;
             TurtleModel.AssignTurtleToSeat(ActionModel.Subject, ActionModel.Target);
             ActionModel.Reset();
         }
     }
 }