According to the Puranas, Prahlada, the son of the demon king Hiranyakashipu, was a devotee of Lord Vishnu. Hiranyakashipu did not like this at all. Then he wants to kill his son. He tries a lot. But every time God protects Prahlada. Holi is about how good always wins over evil. On the other hand, the Puranas say that this festival is also celebrated as a symbol of the love of Radha and Krishna.