int ldrPin = A0;        // LDR sensor connected to analog pin A0
int buzzerPin = 8;      // Passive buzzer connected to pin 8
int redPin = 6;         // Red pin of RGB LED
int greenPin = 3;      // Green pin of RGB LED
int bluePin = 5;       // Blue pin of RGB LED

int ldrValue = 0;       // Variable to store LDR value

void setup() {
  pinMode(buzzerPin, OUTPUT);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  Serial.begin(9600);   // Start Serial Monitor
}

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

  if (ldrValue >= 10 && ldrValue <= 100) {
    // Magenta (Red +  Blue)
    analogWrite(redPin, 255);
    analogWrite(greenPin, 0);
    analogWrite(bluePin, 255);
    tone(buzzerPin, 233);
    Serial.println("Mode: Magenta (233 Hz)");
  }
  else if (ldrValue >= 130 && ldrValue <= 270) {
    // White (Red + Green + Blue)
    analogWrite(redPin, 255);
    analogWrite(greenPin, 255);
    analogWrite(bluePin, 255);
    tone(buzzerPin, 333);
    Serial.println("Mode: White (333 Hz)");
  }
  else if (ldrValue >= 300 && ldrValue <= 480) {
    // Orange (Red + small amount of Green)
    analogWrite(redPin, 255);
    analogWrite(greenPin, 128);
    analogWrite(bluePin, 0);
    tone(buzzerPin, 444);
    Serial.println("Mode: Orange (444 Hz)");
  }
  else {
    // Turn off LED and buzzer when out of range
    analogWrite(redPin, 0);
    analogWrite(greenPin, 0);
    analogWrite(bluePin, 0);
    noTone(buzzerPin);
  }

  delay(300); // Small delay for stability
}