In order to make Christmas LED lights blink, you will need to install a blinker module or a blinker circuit. These components are designed to control the blinking of the lights, and they can be found in many electronic stores or online. Once you have installed the blinker module or circuit, you can simply connect your LED lights to it and adjust the settings to create the desired blinking effect. Be sure to follow all safety precautions when working with electricity and electronic components.