const int ldrPin = A0; // LDR connected to analog pin A0
const int ledPin = 9;  // LED connected to digital pin 9

void setup() {
  pinMode(ledPin, OUTPUT); // Set up the LED pin as an output
  Serial.begin(9600);      // Start serial communication at 9600 bps
}

void loop() {
  int ldrValue = analogRead(ldrPin); // Read the LDR value
  int ledBrightness = map(ldrValue, 0, 1023, 255, 0); // Map LDR value to LED brightness (inverted)
  ledBrightness = constrain(ledBrightness, 0, 255);   // Constrain the brightness to 0-255
  analogWrite(ledPin, ledBrightness); // Set the LED brightness
  Serial.println(ledBrightness);      // Print the brightness value to serial monitor
  delay(100); // Wait for 100 milliseconds
}