how do you make christmas lights flash

To make Christmas lights flash, you will need a flashing light controller. This controller will allow you to set the light pattern and timing, as well as adjust the brightness and color of the lights. The controller will also allow you to control the lights remotely, so you can turn them on and off from anywhere in your home or yard. To make the lights flash, you will need to connect the controller to the power supply for your lights and then set the controller to the desired flashing pattern.