//01 Display Right most Top LED
//02 Display Left most Top LED
//03 Display Right most bottom LED
//04 Display Left  most bottom LED
//05 Display Topmost Row all LEDs
//06 Display Bottom most Row all LEDs
//07 Display Left most Column all LEDs
//08 Display Right most Column all LEDs
void setup() {
  // put your setup code here, to run once:
  direction();

}

void loop() {
  // put your main code here, to run repeatedly:
 code();
}

//*******************************************
void delay_()
{
  volatile long i;
  for(i=0;i<500000;i++);
}

void direction()
{
  volatile char *dirf,*dirk;
  dirf = 0x30; dirk = 0x107;
  *dirf = 0xFF; *dirk = 0xFF;
}

void code()
{
  volatile char *outf,*outk;
  outf = 0x31; outk = 0x108;
    //01 Display Right most Top LED
    *outf = 0x01;//R
    *outk = 0xFE;//C
    delay_();
    //02 Display Left most Top LED
    *outf = 0x80;//R
    *outk = 0xFE;//C
    delay_();
    //03 Display Right most bottom LED
    *outf = 0x01;//R
    *outk = 0x7F;//C
    delay_();
    ////04 Display Left  most bottom LED
    *outf = 0x80;//R
    *outk = 0x7F;//C
    delay_();
    //05 Display Topmost Row all LEDs
    *outf = 0xFF;//R
    *outk = 0xFE;//C
    delay_();
    //06 Display Bottom most Row all LEDs
    *outf = 0xFF;//R
    *outk = 0x7F;//C
    delay_();
    //07 Display Left most Column all LEDs
    *outf = 0x80;//R
    *outk = 0x00;//C
    delay_();
    //08 Display Right most Column all LEDs
    *outf = 0x01;//R
    *outk = 0x00;//C
    delay_();

}