#include <avr/io.h>
#include <util/delay.h>

#define LED_PIN_BIT 5

int main() 
{
  DDRB |= (1 << LED_PIN_BIT);    // Set the LED pin as output

  while (1) 
  {
    PORTB ^= (1 << LED_PIN_BIT); // Toggle LED status
    _delay_ms(1000);

  }

  return 0;
}