int potNum;

const int pinPot = A0;
const int pin1 = 11;
const int pin2 = 10;
const int pin3 = 9;

void setup() {
  // put your setup code here, to run once:
  pinMode(pin1, OUTPUT);
  pinMode(pin2, OUTPUT);
  pinMode(pin3, OUTPUT);
  pinMode(pinPot, INPUT);

  Serial.begin(115200);

}

void loop() {
  // put your main code here, to run repeatedly:
  potNum = analogRead(pinPot);
  Serial.println(potNum);

  if (potNum < 255) {
    digitalWrite(pin1, HIGH);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, LOW);
  }
  else if (potNum < 510) {
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, HIGH);
    digitalWrite(pin3, LOW);
  }
  else if (potNum < 725) {
    digitalWrite(pin1, LOW);
    digitalWrite(pin2, LOW);
    digitalWrite(pin3, HIGH);
  }
  else {
    digitalWrite(pin1, HIGH);
    digitalWrite(pin2, HIGH);
    digitalWrite(pin3, HIGH);
  }
  delay(50);
}