public static IEnumerable <Note> BlueRedStacked(
            float time,
            HorizontalPosition horizontalPosition,
            VerticalPosition lowVerticalPosition)
        {
            if (lowVerticalPosition == VerticalPosition.Top)
            {
                throw new ArgumentOutOfRangeException(nameof(lowVerticalPosition));
            }
            var cutDirection = horizontalPosition.InSet(HorizontalPosition.Left, HorizontalPosition.CenterLeft)
                ? CutDirection.Left
                : CutDirection.Right;

            return(new[]
            {
                new Note(time, Hand.Left, cutDirection, horizontalPosition, lowVerticalPosition),
                new Note(time, Hand.Right, cutDirection, horizontalPosition, lowVerticalPosition + 1)
            });
        }