https://youtu.be/X3Ce89f873Y Simulated LED Sand Physics! These LEDs interact with motion and looks like they’re affect by gravity. An Adafruit LED matrix displays the LEDs as little grains of sand which are driven by sampling an accelerometer with Raspberry Pi Zero! The 3D Printed handles make it easy to hold the 64x64 LED Matrix and the two buttons make it easy to switch modes or reset simulations! Read the full guide on: https://learn.adafruit.com/matrix-led-sand/