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

#define BUZZER_PIN 7

int main(void) {
    DDRE |= (1 << BUZZER_PIN);

    while (1) {
        PORTE |= (1 << BUZZER_PIN);
        _delay_ms(200);

        PORTE &= ~(1 << BUZZER_PIN);
        _delay_ms(100); 
    }

    return 0;
}