#include <LedControl.h>
LedControl lc=LedControl(12,11,10,1);

int i, delaytime=500;

byte happy[8]=
{
  B00111100,
  B01000010,
  B10100101,
  B10000001,
  B10000001,
  B10100101,
  B01011010,
  B00111100
};



byte sad[8]=
{
  B00111100,
  B01000010,
  B10100101,
  B10000001,
  B10011001,
  B10100101,
  B01000010,
  B00111100
};


void setup()
{
    //The MAX72XX is in power-saving mode on startup,
    lc.shutdown(0,false);   // wakeup The MAX7219
    lc.setIntensity(0,8);   // Set brightness to a medium value
    lc.clearDisplay(0);     // Clear the display  
}

void loop()
{
    for(i=0; i<8; i++)
      lc.setRow(0,i,happy[i]);
    delay(delaytime);
   
    for(i=0; i<8; i++)
      lc.setRow(0,i,sad[i]);
    delay(delaytime);
}