colorful sand demo based on Adafruit PixelDust for particle physics
requires an arduino (ESP-12E), an accelerometer (LSM6) hooked via I2C but using GPIO 1+3 for comm and a P3 (64x32) RGB LED matrix
watch a video here https://youtu.be/mp0g83j1C60
see here for hook-up guide for P3 and ESP https://github.com/lmirel/ardu-sand/wiki/ESP8266-and-P3-hookup