int potentioMeter = A0;
int LED1 = 9;
int LED2 = 10;
int LED3 = 11;
int LED4 = 12;

void setup()
{
  Serial.begin(9600);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(A0, INPUT);
}

void loop()
{
  int value = analogRead(A0);
  value = map(value, 0, 1023, 0, 100);
  Serial.println(value);
  if (value < 15)
  {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, HIGH);
  }

  if (value >= 15 && value < 40)
  {
    digitalWrite(LED4, HIGH);
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);
  }

  if (value >= 40 && value < 60)
  {
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, LOW);
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
  }

  if (value >= 60 && value < 85)
  {
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, LOW);
    digitalWrite(LED4, LOW);
    digitalWrite(LED1, LOW);
  }

  if (value >= 85)
  {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);
    digitalWrite(LED4, LOW);
  }
}