void setup() {
// put your setup code here, to run once:
volatile char *dir;
dir=0x107;
*dir|=0xFF;//set to output pin
}
void Blink_all_the_LEDs_with_delay(volatile char *out){
unsigned long i;
*out|=0xFF;
delay(500);
*out&=~0xFF;
delay(500);
}
void LEDs_one_by_one_not_off(volatile char *out){
  unsigned int i;
  for(i=0;i<=7;i++){
    *out|=(1<<i);
    delay(500);
  }
}
void LEDs_one_by_one(volatile char *out){
  unsigned int j;
  for(j=0;j<8;j++){
    *out=(1<<j);
    delay(500);
  }
}
void LEDs_one_by_one_not_off_odd(volatile char *out){
  unsigned int k;
  for(k=0;k<8;k++){
    if(k%2!=0){
      *out|=(1<<k);
    }
  }
}
void LEDs_O(volatile char *out){
  unsigned int k;
  for(k=0;k<=3;k++){
    *out=(1<<k);
    delay(500);
}
}
void LEDs_Q(volatile char *out){
   unsigned int k;
  for(k=4;k<=7;k++){
    *out=(1<<k);
    delay(500);
}
}
void LEDs_P(volatile char *out){
   unsigned int k;
  for(k=7;k>=4;k--){
    *out=(1<<k);
    delay(500);
}
}
void LEDs_one_by_one_not_off_even(volatile char *out){
  unsigned int k;
  for(k=0;k<8;k++){
    if(k%2==0){
      *out|=(1<<k);
    }
  }
}
void loop() {
  // put your main code here, to run repeatedly:
  volatile char *out;
  out=0x108;
  unsigned int value=0;
  value=8;
  switch(value){
    case 1:
    Blink_all_the_LEDs_with_delay(out);
    break;
    case 2:
    LEDs_one_by_one_not_off(out);
    break;
    case 3:
    LEDs_one_by_one(out);
    break;
    case 4:
    LEDs_one_by_one_not_off_odd(out);
    break;
    case 5:
    LEDs_one_by_one_not_off_even(out);
    break;
    case 6:
    LEDs_O(out);
    break;
    case 7:
    LEDs_P(out);
    break;
    case 8:
    LEDs_Q(out);
    break;
    default:
    break;
  }
}