// Define the LED pins
const int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13};
const int numLeds = sizeof(ledPins) / sizeof(ledPins[0]);
const int delayTime = 100;  // Delay time in milliseconds

void setup() {
  // Initialize each pin as an output
  for (int i = 0; i < numLeds; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  // First pattern: moving forward
  for (int i = 0; i < numLeds; i++) {
    digitalWrite(ledPins[i], HIGH);
    delay(delayTime);
    digitalWrite(ledPins[i], LOW);
  }

  // Second pattern: moving backward
  for (int i = numLeds - 1; i >= 0; i--) {
    digitalWrite(ledPins[i], HIGH);
    delay(delayTime);
    digitalWrite(ledPins[i], LOW);
  }

  // Third pattern: alternate LEDs on/off
  for (int i = 0; i < numLeds; i++) {
    if (i % 2 == 0) {
      digitalWrite(ledPins[i], HIGH);
    }
  }
  delay(2 * delayTime);
  for (int i = 0; i < numLeds; i++) {
    digitalWrite(ledPins[i], LOW);
  }

  for (int i = 0; i < numLeds; i++) {
    if (i % 2 != 0) {
      digitalWrite(ledPins[i], HIGH);
    }
  }
  delay(2 * delayTime);
  for (int i = 0; i < numLeds; i++) {
    digitalWrite(ledPins[i], LOW);
  }

  // Fourth pattern: two LEDs moving toward the center
  for (int i = 0; i < numLeds / 2; i++) {
    digitalWrite(ledPins[i], HIGH);
    digitalWrite(ledPins[numLeds - 1 - i], HIGH);
    delay(delayTime);
    digitalWrite(ledPins[i], LOW);
    digitalWrite(ledPins[numLeds - 1 - i], LOW);
  }

  // Fifth pattern: two LEDs moving away from the center
  for (int i = numLeds / 2 - 1; i >= 0; i--) {
    digitalWrite(ledPins[i], HIGH);
    digitalWrite(ledPins[numLeds - 1 - i], HIGH);
    delay(delayTime);
    digitalWrite(ledPins[i], LOW);
    digitalWrite(ledPins[numLeds - 1 - i], LOW);
  }

  // Add more patterns here if you like
}