//2. Press 2nd switch blink 8 LEDs.
#define Delay 60000
void setup() {
  // put your setup code here, to run once:
volatile char *dir_f;
volatile char *dir_k;
volatile char *out_f;
volatile char *in_k;
volatile char x;
volatile long j;
dir_f = 0x30;
out_f = 0x31;
dir_k = 0x107;
in_k = 0x106;
*dir_f = 0xff;
*dir_k = 0x00;
while(1)
{
  x = *in_k;
  if((x&0x04)== 0x04)//bit masking
  //if(0x04 == *in_k)
  {
   while(1)
    {
    *out_f = 0xff;
    for(j=0;j<Delay;j++);
    *out_f = 0x00;
    for(j=0;j<Delay;j++);

    }
}
}
}

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

}