Ah, the tricky task of hanging Christmas lights around a window. Let me guide you through the process, step by step. First, measure the perimeter of the window to determine the exact amount of lights you'll need. Then, string the lights evenly around the window frame, making sure to leave enough slack to plug them in. Next, use a ladder to reach the top of the window and hang the lights there. Finally, step back and admire your handiwork! With a little bit of care and attention, you can create a beautiful and festive display around your window.