// C++ code
//

const int potPin = A0;
const int pwmPin1 = 3;
const int pwmPin2 = 5;
const int pwmPin3 = 6;
int digitalPinsInUse [] = {3,5,6};
int i;

void setup()
{
  pinMode(potPin, INPUT);
  pinMode (pwmPin1, OUTPUT);
  pinMode (pwmPin2, OUTPUT);
  pinMode (pwmPin3, OUTPUT);
  Serial.begin(9600);
}

int potLight(int highPin) {
  for (i = 0; i < 3; ++i) {
    if (digitalPinsInUse[i] == highPin) {
      digitalWrite(digitalPinsInUse[i], HIGH);
      Serial.print("Pin ");
      Serial.print(digitalPinsInUse[i]);
      Serial.println(" HIGH");
    }
    else {
      digitalWrite(digitalPinsInUse[i], LOW);
    }
  }
}

void loop()
{
  int potAmount = analogRead(potPin);
    //Serial.println(potAmount);
  if (potAmount < 341) {
    potLight(pwmPin1);
  }
  else if (potAmount < 682) {
    potLight(pwmPin2);
  }
  else if (potAmount <= 1023) {
    potLight(pwmPin3);
  }
}