public static Level getNextLevel(Global global){
    	int index=0;
		for (index=0; index<global.getLevels().size(); index++){
			Level level = global.getLevels().get(index);
			if (level.equals(global.getCurrent().getCurrentLevel())){
				break;
			}
		}
		Level level = null;
		if (index==0) level = InitLevel1.loadLevel1(global);
		else if (index==1) level = InitLevel2.loadLevel2(global);
		else if (index==2) level = InitLevel3.loadLevel3(global);
		else if (index==3) level = InitLevel1.loadLevel1(global);
		
		global.getLevels().add(level);
		return level;
    }