const int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11}; // LED pins for 10 LEDs
const int potPin = A0;  // Potentiometer pin
int mode = 0;           // Current mode
int potValue;           // Value from potentiometer

void setup() {
  for (int i = 0; i < 10; i++) {  // Set up 10 LEDs
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  potValue = analogRead(potPin); // Read the potentiometer value
  mode = map(potValue, 0, 1023, 0, 5); // Map to 6 modes (0-5)

  switch (mode) {
    case 0: // On (Stay)
      for (int i = 0; i < 10; i++) {  // Keep LEDs on
        digitalWrite(ledPins[i], HIGH);
      }
      break;

    case 1: // Chase Effect
      for (int i = 0; i < 10; i++) {
        digitalWrite(ledPins[i], HIGH); // Turn on the current LED
        delay(200);                     // Wait for 200 milliseconds
        digitalWrite(ledPins[i], LOW);  // Turn off the current LED
      }
      break;

    case 2: // Blink
      for (int i = 0; i < 10; i++) {
        digitalWrite(ledPins[i], HIGH);
      }
      delay(500);
      for (int i = 0; i < 10; i++) {
        digitalWrite(ledPins[i], LOW);
      }
      delay(500);
      break;

    case 3: // Close (Dim)
      for (int i = 0; i < 10; i++) {
        analogWrite(ledPins[i], 128); // Half brightness, only works with PWM pins
      }
      break;

    case 4: // Sequential Blink
      for (int i = 0; i < 10; i++) {
        digitalWrite(ledPins[i], HIGH); // Turn on the current LED
        delay(300);                     // Wait for 300 milliseconds
        digitalWrite(ledPins[i], LOW);  // Turn off the current LED
        delay(50);                      // Wait before the next LED
      }
      break;

    case 5: // Running Light Effect
      // Forward direction
      for (int i = 0; i < 10; i++) {
        digitalWrite(ledPins[i], HIGH); // Turn on the current LED
        delay(100);                     // Wait for 100 milliseconds
        digitalWrite(ledPins[i], LOW);  // Turn off the current LED
      }
      // Backward direction
      for (int i = 8; i >= 0; i--) {
        digitalWrite(ledPins[i], HIGH); // Turn on the current LED
        delay(100);                     // Wait for 100 milliseconds
        digitalWrite(ledPins[i], LOW);  // Turn off the current LED
      }
      break;
  }
}