To make your Christmas tree lights blink, you will need to follow a few steps. First, check that your lights are blinking lights, rather than static lights. Next, you will need to locate the blinking function switch, which is usually located on the light controller box. Once you have found the switch, you can turn it on to activate the blinking function. You may also want to adjust the speed of the blinking by using the speed control knob, if your light controller box has one. Finally, plug your lights into the outlet and enjoy the blinking lights on your Christmas tree!