int pinPot = 15;
int pinLed1 = 23;
int pinLed2 = 22;
int pinLed3 = 21;

void setup() {
  Serial.begin(9600);

  pinMode(pinPot, INPUT);
  pinMode(pinLed1, OUTPUT);
  pinMode(pinLed2, OUTPUT);
  pinMode(pinLed3, OUTPUT);
}

void loop() {
  int valorPot = analogRead(pinPot);
  if(valorPot == 0 ){
    digitalWrite(pinLed1, LOW);
    digitalWrite(pinLed2, LOW);
    digitalWrite(pinLed3, LOW);
  }
  else if (valorPot <= 1365){
    digitalWrite(pinLed1, HIGH);
    digitalWrite(pinLed2, LOW);
    digitalWrite(pinLed3, LOW);
  }
  else if(valorPot >= 2730){
    digitalWrite(pinLed1, HIGH);
    digitalWrite(pinLed2, HIGH);
    digitalWrite(pinLed3, HIGH);
  } else{
    digitalWrite(pinLed1, HIGH);
    digitalWrite(pinLed2, HIGH);
    digitalWrite(pinLed3, LOW);
  }
}