public virtual void GoNextStage()
{
if (CurrentStage != null)
{
CurrentStage.Remove();
CurrentStage = null;
}
if (!IsLoop)
{
CurrentStageData = stages.Dequeue();
}
List <Piece> pieceList = GenerateStage(CurrentStageData);
int timeLimit = CurrentStageData.TimeLimitSeconds;
CurrentStage = new StageController(timeLimit, pieceList);
}