Is the described menstrual period, which extends for seven days with varying amounts and colors of blood, correct, and are the prayers performed after the ritual bath at the end of the seventh day valid?

If a woman sees menstrual blood, she must refrain from prayer and the like until she sees purity, indicated by one of its two signs: dryness or the white discharge. Once she sees purity, she is obligated to promptly perform ghusl (ritual bath). If menstruation returns at a time when it is possible for it to be menstruation, she is considered to be menstruating again. If she sees yellowish or brownish discharge after purity, then if it occurs during her habitual period, it is considered menstruation; otherwise, it is not. Delaying ghusl to confirm purity is a correct and obligatory action. If purity is confirmed before that, she must perform ghusl and pray. Some scholars have permitted waiting for a day or half a day after the cessation of blood to confirm purity, especially if the cessation occurs during her habitual period.