const int numLeds = 5;
const int ledPins[numLeds] = {4, 5, 6,7,8};
const int blinkDelay = 100; // Time each LED stays on/off during blink
const int stepDelay = 300;  // Time between moving to next LED

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

void loop() {
  // Run from left to right
  for (int i = 0; i < numLeds; i++) {
    animateLED(i);
  }

  // Run from right to left
  for (int i = numLeds - 1; i >= 0; i--) {
    animateLED(i);
  }
}

void animateLED(int ledIndex) {
  // Blink the current LED three times
  for (int blinkCount = 0; blinkCount < 3; blinkCount++) {
    digitalWrite(ledPins[ledIndex], HIGH);
    delay(blinkDelay);
    digitalWrite(ledPins[ledIndex], LOW);
    delay(blinkDelay);
  }
  delay(stepDelay); // Pause before moving to next LED
}