int ledPins[] = {2, 3, 4}; // LED chiroqlar uchun pinlar
int delayTime = 1000;      // 1 sekund vaqt oraligi

void setup() {
  for (int i = 0; i < 3; i++) {
    pinMode(ledPins[i], OUTPUT); // LED chiroqlarini OUTPUT sifatida sozlash
  }
}

void loop() {
  for (int i = 0; i < 3; i++) {
    digitalWrite(ledPins[i], HIGH); // LEDni yonish
    delay(delayTime);                // To'xtatish
    digitalWrite(ledPins[i], LOW);  // LEDni o'chirish
  }

  for (int i = 2; i >= 0; i--) {
    digitalWrite(ledPins[i], HIGH); // LEDni yonish
    delay(delayTime);                // To'xtatish
    digitalWrite(ledPins[i], LOW);  // LEDni o'chirish
  }
}