How far along are you? You’ll need to flash an ATtiny13A MCU after you compile a firmware.. Depending on how much light you need there are different driver options. The Nanjg 105c is really the prototypical driver for most of our efforts. These efforts largely started with Tido’s BLF-VLD firmware. While his firmware is not as commonly used or discussed anymore, the initial info thread kicked things off and is still a great start for beginners. Related information is also available on this wiki page.
I don’t know what the power requirements of your burning man project will be, but RBD maintains a list including some other drivers you could use.
All that said, be very careful if you aren’t that familiar with LEDs and electronics. If you are running your project on a big battery (car battery, deep cycle, many 18650’s in parallel, etc) then the popular “DD” drivers may not be appropriate (they may destroy LEDs depending on the input to the driver).