void setup() {
  // put your setup code here, to run once:
  volatile char *dirf, *dirk, *dataf, *ink, x;
  volatile long i;
  // port setup
  //******************************************
  // Press 0th switch glow 8 LEDs
  dirf = 0x30; dirk = 0x107;
  *dirf = 0xFF; *dirk = 0x00;
  // data
  dataf = 0x31; ink = 0x106;
  while (1) {
    x = *ink;
    if ((x & 0x02) == 0x02) {
      *dataf = 0x99;
    } 
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  
} // Press 1st switch At a time glow 0th LED,3rd LED,   1001 1001
  // 4th LED,7th LED