That’s wrong.
What you need is 2D gap file and that one would look similar to what you posted without curly braces part.
You also need to set up your LEDs in a 2D configuration.
[1,...1,
1,...1,
...
0,...0,
1,...,1,
...]
Were did you find addressable pixie (fairy) LEDs"
They are on AliExpress. Here’s the link that I bought from, but there’s a couple/few vendors that have them, I think. Fairy Pixels
Warning: The wire labels shown on that link are incorrect. If you buy from them and ask - they’ll send a length of pixels with the proper labels.
It’s: Power/Data/Ground/Return. Power has the faint-to-see red spots.
Most places are now calling them seed/pebble lights/pixels. Lot’s of places have them now.
Wally’s, Your Pixel Store, Mattos Designs, Pixel-Now… The only place I have seen ones with a 4th wire for return data is Ali Express.