how to make christmas tree lights blink

To make Christmas tree lights blink, you can use a flasher unit or a light controller. The flasher unit is a small device that attaches to the strings of lights and can be set to blink at different intervals. The light controller is a larger device that can be connected to the lights and the power source, allowing you to control the blinking pattern and speed from a remote control. The controller can be programmed to blink the lights in different patterns, or to flash the lights in sync with music.