void setup() {
  // put your setup code here, to run once:
DDRF|=0xFF;//setting row to output
DDRK|=0x00;//setting colum to input
DDRA|=0xFF;//setting led pins output
DDRC|=0xFF;
}

void loop() {
  // put your main code here, to run repeatedly:
  volatile char *pin,x;
  pin=0x106;
  volatile char *outa;
  outa=0x22;
  volatile long i,j;
  while(1){
  for(i=0;i<4;i++){
    PORTF=(1<<i);
    *outa=*pin;
    if(*pin!=0){
    PORTC=(1<<i);
    for(j=0;j<100000;j++);
    PORTC=0;
    }
  }
  }
}