mbp3

// required libraries
#include <Wire.h>
#include "Adafruit_LEDBackpack.h"
#include "Adafruit_GFX.h"

// define matrix object
Adafruit_8x8matrix matrix = Adafruit_8x8matrix();

void setup() 
{
  // start the matrix at I2C address - default is 0x70
  matrix.begin(0x70);  // pass in the address
}

void loop()
{
  matrix.setRotation(0);
  matrix.setTextSize(1);
  matrix.setTextWrap(false); // false means nice scroll, true means each character appears, scrolls off, then repeat
  matrix.setTextColor(LED_ON);
  for (int8_t x=0; x>=-96; x--) // 96 is number of characters to display x 8
  {
    matrix.clear();
    matrix.setCursor(x,0);
    matrix.print("Hello, world");
    matrix.writeDisplay();
    delay(100);
  }

  delay(500);
  matrix.setRotation(1);  
  matrix.setTextSize(1);
  matrix.setTextWrap(false); // false means nice scroll, true means each character appears, scrolls off, then repeat
  matrix.setTextColor(LED_ON);
  for (int8_t x=0; x>=-96; x--) // 96 is number of characters to display x 8
  {
    matrix.clear();
    matrix.setCursor(x,0);
    matrix.print("Hello, world");
    matrix.writeDisplay();
    delay(100);
  }  

  delay(500);
  matrix.setRotation(2);  
  matrix.setTextSize(1);
  matrix.setTextWrap(false); // false means nice scroll, true means each character appears, scrolls off, then repeat
  matrix.setTextColor(LED_ON);
  for (int8_t x=0; x>=-96; x--) // 96 is number of characters to display x 8
  {
    matrix.clear();
    matrix.setCursor(x,0);
    matrix.print("Hello, world");
    matrix.writeDisplay();
    delay(100);
  }  

  delay(500);
  matrix.setRotation(3);  
  matrix.setTextSize(1);
  matrix.setTextWrap(false); // false means nice scroll, true means each character appears, scrolls off, then repeat
  matrix.setTextColor(LED_ON);
  for (int8_t x=0; x>=-96; x--) // 96 is number of characters to display x 8
  {
    matrix.clear();
    matrix.setCursor(x,0);
    matrix.print("Hello, world");
    matrix.writeDisplay();
    delay(100);
  }  
}