Here are the major steps to build your own animated Christmas lights show.  Each step is fully described in this website.

1. Install the xLights program on your computer
2. Create controllers for your strings of lights using Arduino microprocessors
3. Configure xLights to talk to your controllers
4. Create animations for your light show
5. (optional)
   1. Install Falcon Player onto Raspberry Pi
   2. Copy xLights animation recordings to the Pi
   3. Configure Falcon Player to allow Internet control
   4. Create streaming webcam
   5. Configure your Internet router to allow the world to access Falcon Player and your webcam
   6. Create a website that allows the world to control your lights