Is prayer and fasting obligatory during a one or two-day break in menstrual bleeding, and is black blood before or at the end of the period considered part of menstruation?

If a small amount of blood comes down during the period of menstruation, it is considered menstruation, and you must stop praying and fasting. When the bleeding stops, perform ghusl and pray. If the blood returns after a day or two, stop praying until it completely ceases. Black blood, yellowish discharge, and brownish discharge during the time of menstruation are considered menstruation.