/* Blink Pola Running — 5 LED (Knight Rider) */ const int ledPin[5] = {13, 12, 11, 10, 9}; void setup() {  for (int i = 0; i < 5; i++)    pinMode(ledPin[i], OUTPUT);} void loop() {  // maju: LED 0 → 4  for (int i = 0; i < 5; i++) {    digitalWrite(ledPin[i], HIGH);    delay(150);    digitalWrite(ledPin[i], LOW);  }  // mundur: LED 3 → 0  for (int i = 3; i >= 0; i--) {    digitalWrite(ledPin[i], HIGH);    delay(150);    digitalWrite(ledPin[i], LOW);  }}