int ldrPin = A0;
int led1 = 5;          // LED for low light (night)
int led2 = 6;          // LED for medium light
int led3 = 7;          // LED for bright light (day)
int buzzer = 8;        // Active buzzer
int ldrValue = 0;      // Variable to store LDR value

void setup() {
  Serial.begin(9600);
  pinMode(ldrPin, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(buzzer, OUTPUT);
}

void loop() {
  ldrValue = analogRead(ldrPin);  // Read LDR value
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  // NORMAL LIGHT
  if (ldrValue < 300) {
    digitalWrite(led1, HIGH);   // Turn ON LED1
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(buzzer, LOW); // Buzzer ON
    Serial.println("NORMAL LIGHT → LED1 ON, Buzzer OFF");
  }

  // SAVE light (evening)
  else if (ldrValue >= 300 && ldrValue < 700) {
    digitalWrite(led1, LOW);
    digitalWrite(led2, HIGH);  // Turn ON LED2
    digitalWrite(led3, LOW);
    digitalWrite(buzzer, LOW);
    Serial.println("SAVE Light → LED2 ON");
  }

  // Danger light (day)
  else {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, HIGH);  // Turn ON LED3
    digitalWrite(buzzer, HIGH);
    Serial.println("DANGER LIGHT→ BUZZER ON LED3 ON");
  }

  delay(500);
}