how to make christmas tree lights blink

Christmas Elf: "It's quite simple, really. You'll need a strand of lights, a bit of wire, and a small battery-operated device that can control the blinking effect. First, connect the lights to the battery-operated device using the wire. Then, adjust the settings on the device to make the lights blink at a desired speed and pattern. Finally, hang the lights on the Christmas tree and enjoy the blinking light show!"