@Override
	public int setRandomImageIndex() {
		
		int percent = rand.nextInt(100);
		
		if (percent >= 32)
			return 0;
		else if (percent < 32 && percent >= 24)
			return 1;
		else if (percent < 24 && percent >= 16)
			return 2;
		else if (percent < 16 && percent >= 8)
			return 3;
		else
			return 4;
	}