int potentiometerPin = A0;
int redLEDPin = 14;
int greenLEDPin = 15;
int potValue = 0;

void setup() {
  pinMode(redLEDPin, OUTPUT);
  pinMode(greenLEDPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  potValue = analogRead(potentiometerPin);

  if (potValue < 400){
    digitalWrite(redLEDPin, HIGH);
    digitalWrite(greenLEDPin, LOW);
    Serial.println("Too low!");
  }
  else if (potValue > 700) {
    digitalWrite(redLEDPin, HIGH);
    digitalWrite(greenLEDPin, LOW);
    Serial.println("Too high!");
  }
  else {
    digitalWrite(greenLEDPin, HIGH);
    digitalWrite(redLEDPin, LOW);
    Serial.println("Perfect!");
  }

  delay(100);
}