After Dreamstate SF and the many people who gave me a thumbs up and asked me about my neopixel shirt and pants, I wrote a page showing how it works and how to make your own.
Video demo: https://www.youtube.com/watch?v=x2j4XPIIZyU (skip to 3:50)
LED Pants and Shirt Programmed With Arduino on ESP8266:
http://marc.merlins.org/perso/electronics/post_2017-06-02_LED-Pants-and-Shirt-Programmed-With-Arduino-on-ESP8266.html
Source Code: https://github.com/marcmerlin/Neopixel-IR