WS2812B 4x4 RGB LED Matrix Module 5050 16 Bit Full Color Arduino PIC AVR 5PCS | eBay
Overview | 32x16 and 32x32 RGB LED Matrix | Adafruit Learning System
How to Setup an LED Matrix on the Arduino - Circuit Basics
Amazon.com: RGB Full Color LED Matrix Panel 64x64 Pixels, 4096 Individual RGB LEDs,Adjustable Brightness,3mm Pitch, Displaying Text Colorful Image Animation Chainable Design Compatible with Arduino/Raspberry Pi : Electronics