To make your Christmas tree lights blink, you can try the following steps:
1. Make sure the tree lights are plugged into an outlet and that they are turned on.
2. Check the settings on the light controller, if there is one, to see if there is a blinking function available.
3. If there is a blinking function, turn it on and adjust the speed and intensity of the blinking to your liking.
4. If there is no blinking function, you may need to replace the tree lights with ones that have this function built-in.