The MAX7219 dot matrix module is programmed by manipulating the pixels/dots. Different shapes are drawn on the display and some pixel animation is applied.
Link to code:
Contents:
0:00 Introduction
0:16 Block Diagram
0:35 MAX7219 8x32 Module Programming
4:12 C++ Sketch Example 1
4:33 C++ Sketch Example 2
5:27 Future Project: Spectrum Analyzer