That's a great question! Christmas lights are one of the most important decorations during the holiday season, and they can really bring a special sparkle to any window. To put Christmas lights around your window, you can use a staple gun to secure the lights to the window frame. Make sure you start from the top of the frame and work your way down, placing each light carefully to avoid any tangles. You can also use clips to attach the lights directly to the window glass, but make sure you don't use any that could scratch the glass. Have fun decorating!