void setup()
{
  volatile char *dirf,*outf;
  volatile char *dirk,*ink;
  dirf=0x30; outf=0x31;
  dirk=0x107; ink=0x106;
  *dirf=0xFF; *ink=0x00;
  volatile char switches;
  volatile long arr[]={0x77,0X7F,0X39,0X3F,0X79,0X71};
  volatile long i,j,k;
  while(1)
  {
    for(j=0;j<=5;j++)
    {
      *outf=arr[j]; //to display A to F
      for(k=0;k<=200000;k++);// delay
      *outf=0;// off display
    }
  }
}

void loop()
{

}