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

// The main function: our program entry point
int main(void) {
  // Set PB5 as output. DDRB is the data direction register for port B.
  // (1 << PB5) shifts 1 over by PB5 bits creating a bitmask.
  DDRB |= (1 << PB5);

  // Infinite loop to blink the LED
  while (1) {
    // Set PB5 high: LED ON
    PORTB |= (1 << PB5);
    _delay_ms(1000); // Delay 1000 milliseconds (1 second)

    // Clear PB5: LED OFF
    PORTB &= ~(1 << PB5);
    _delay_ms(1000); // Delay 1000 milliseconds (1 second) }

    return 0; // Though this line is never reached because of the infinite loop
  }
}