learning-uno/multible_led/src/main.cpp

#include <Arduino.h>

int ledsCount = 7;
int ledPins[] = {12,11,10,9,8,7,6};

int potMeterPin = A0;
int analogIn = 0;
int outputValue = 0;




void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Start Multiple Led");
  for (int i = 0; i < ledsCount; i++)
  {
    pinMode(ledPins[i], OUTPUT);
  }
  
}

void loop() {
  // put your main code here, to run repeatedly:

  analogIn = analogRead(potMeterPin);
  outputValue = map(analogIn, 0, 1023, 20, 500);
  delay(10);

  for (int i = 0; i < ledsCount; i++)
  { 
    digitalWrite(ledPins[i], HIGH);
    delay(outputValue);
    digitalWrite(ledPins[i], LOW);

  }
  for (int i = ledsCount -1; i >= 0; i--)
  {
    digitalWrite(ledPins[i], HIGH);
    delay(outputValue);
    digitalWrite(ledPins[i], LOW);
  }
}