// Icesythe7 - 2/23/26 1:53AM
// can rotate thru the bits like so

const uint8_t ledPins[] = {2, 3, 4, 5};
constexpr uint8_t NUM_LEDS = sizeof(ledPins) / sizeof(ledPins[0]);

uint8_t leds_active = 0x01;

void setup() {
  for (uint8_t i = 0; i < NUM_LEDS; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  for (uint8_t i = 0; i < NUM_LEDS; i++) {
    digitalWrite(ledPins[i], (leds_active >> i) & 0x01);
  }

  leds_active <<= 1;
  if (leds_active == (1 << NUM_LEDS)) {
    leds_active = 0x01;   // wrap
  }

  delay(200);
}