Tell us about yourself!
If you missed it. There is a text file that has the complete code that can be copied directly into the IDE program software to create the program file.I almost missed it myself.
I made this last year too. Was working off 3 different instructables to try and add music to it but the music controller failed to work. (programming issues). Since then I have got the music controller to work but have not tried it out on the Arduino Chirstmas box.
According to your link the roll of 60 Addressable LED is $41.50. Neoixel are more costly than the regular 2812 RGB LED.
Arduino Watch Sport
Beer Keg Metal Melting Furnace
How to build a Hydraulic Ram Pump
Folding Extension Cord Organizer!
Cheap Solar Fridge
Lost Foam Casting
Disassembling a CD/DVD reader and reusing its parts