mbp8

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

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

int z;

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

void loop()
{
  matrix.clear();      // clear display
  for (z=0; z<8; z++)
  {  
    matrix.drawPixel(z, 0, LED_ON);  
    matrix.writeDisplay();  // write the changes we just made to the display
    delay(50);
    matrix.drawPixel(z, 0, LED_OFF);  
    matrix.writeDisplay();  // write the changes we just made to the display     
  }  

  for (z=0; z<8; z++)
  {  
    matrix.drawPixel(7, z, LED_ON);  
    matrix.writeDisplay();  // write the changes we just made to the display
    delay(50);
    matrix.drawPixel(7, z, LED_OFF);  
    matrix.writeDisplay();  // write the changes we just made to the display     
  }  

  for (z=7; z>=0; --z)
  {  
    matrix.drawPixel(z, 7, LED_ON);  
    matrix.writeDisplay();  // write the changes we just made to the display
    delay(50);
    matrix.drawPixel(z, 7, LED_OFF);  
    matrix.writeDisplay();  // write the changes we just made to the display     
  }  

  for (z=7; z>=0; --z)
  {  
    matrix.drawPixel(0, z, LED_ON);  
    matrix.writeDisplay();  // write the changes we just made to the display
    delay(50);
    matrix.drawPixel(0, z, LED_OFF);  
    matrix.writeDisplay();  // write the changes we just made to the display     
  }  
}