const int ledPins[5] = {2, 3, 4, 5, 6};  // LED pins
int count = 0;  // Start count at 0

void setup() {
  for (int i = 0; i < 5; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  for (int i = 0; i < 5; i++) {
    digitalWrite(ledPins[i], bitRead(count, i)); // Set LEDs according to binary value
  }

  count++;  // Increment count
  if (count > 31) count = 0;  // Reset after reaching 31

  delay(500);  // Wait 500ms
}