The woman who has started menstruating, if some of her blood is black

Question : And it did not fall below the minimum. What is the minimum? A day and a night. So if this woman who has started menstruating says, “By Allah, the first night the blood came to me, it was black, then it turned red until the twentieth day,”

Answer : Does she go back to the period of discernment now, or not? Why? Because it fell below the minimum. And if it falls below the minimum of menstruation, it is not menstruation. So she does not go back to it.