How to set the pre-notification flash on Samsung mobile phone

The setting path of mobile phone LED flashing reminder is as follows: Settings-(display) -LED indicator-charging/low battery/notification/recording-inspection. When charging, the screen is closed and the red light is on; When the battery power is low, the screen closes and the red light flashes; If the call is not answered, the message will flash in blue; When you record voice and close the screen, the blue LED flashes.