const int potPin = A0;     // Analog input pin for the potentiometer
const int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9, 10};  // Array of output pins for LEDs
const int numLeds = 9;     // Number of LEDs

void setup() {
  pinMode(ledPins[0], OUTPUT);  // Set the first LED pin as output
  digitalWrite(ledPins[0], HIGH);  // Initially, turn on the first LED

  for (int i = 1; i < numLeds; i++) {
    pinMode(ledPins[i], OUTPUT);  // Set the remaining LED pins as outputs
    digitalWrite(ledPins[i], LOW);  // Initially, turn off the other LEDs
  }
}

void loop() {
  int potValue = analogRead(potPin); // Read potentiometer value (0-1023)

  // Map the potentiometer value to the range 0-7000
  int mappedValue = map(potValue, 0, 1023, 0, 7000);

  // Calculate how many LEDs to turn on based on the mapped value
  int ledCount = map(mappedValue, 0, 7000, 0, numLeds - 1);

  // Turn on the LEDs based on the calculated count, starting from the second LED
  for (int i = 1; i <= ledCount; i++) {
    digitalWrite(ledPins[i], HIGH);
  }

  // Turn off any LEDs that are not turned on
  for (int i = ledCount + 1; i < numLeds; i++) {
    digitalWrite(ledPins[i], LOW);
  }
}