8x8 LED Matrix random pixels

random_matrix8x8.ino

#include <Wire.h>
#include <Adafruit_GFX.h>
#include "Adafruit_LEDBackpack.h"

Adafruit_8x8matrix matrix = Adafruit_8x8matrix();

void setup() {
  Serial.begin(9600);
  Serial.println("8x8 LED Matrix random pixels");
  randomSeed(analogRead(0));
  matrix.begin(0x70);
}

void loop() {
  for (int i = 0; i < 8; i++) {
    for (int j = 0; j < 8; j++) {
      matrix.drawPixel(i, j, random(0, 2));
    }
  }
  matrix.writeDisplay();

  delay(70);
}