#include <avr/io.h>
#include <util/delay.h>
# define LED_PIN 5 
#define BARB *((volatile byte*)0x24)
#define PINOIN *((volatile byte*)0x25)

void ledPinOn(){
  PINOIN|= (1<<LED_PIN); 
  
}
void ledPinOff(){
  PINOIN &= ~(1<<LED_PIN);
}
void setup() {
  // put your setup code here, to run once:
   BARB |= (1<<LED_PIN);
}

void loop() {
  // put your main code here, to run repeatedly:
  for(long i =0;i<1000000;i++){
    ledPinOn();
  }
  
 
 for(long j =0;j<1000000;j++){
     ledPinOff();
  }
}