#define LDR_PIN A0      // Photoresistor connected to analog pin A0
#define LED_PIN 13       // Main LED connected to digital PWM pin (make sure this is a PWM-capable pin)

void setup() {
  pinMode(LDR_PIN, INPUT);           // Set LDR pin as input
  pinMode(LED_PIN, OUTPUT);          // Set LED pin as output
  Serial.begin(9600);                // Initialize serial monitor for debugging
}

void loop() {
  // Read ambient light level from LDR
  int ldrValue = analogRead(LDR_PIN);                
  int ledBrightness = map(ldrValue, 0, 1023, 255, 0); // Map LDR value to LED brightness

  // Adjust main LED brightness based on ambient light
  analogWrite(LED_PIN, ledBrightness);               

  // Debug output to monitor LDR values and LED brightness
  Serial.print("LDR Value: ");
  Serial.print(ldrValue);
  Serial.print(" | LED Brightness: ");
  Serial.println(ledBrightness);

  delay(100);  // Delay for stability
}