int ldrPin = A0;  // LDR connected to analog pin A0
int ldrValue = 0; // Variable to store LDR value

void setup() {
  Serial.begin(9600);   // Start serial communication
  pinMode(ldrPin, INPUT);
}

void loop() {
  ldrValue = analogRead(ldrPin);  // Read value from LDR
  Serial.print("LDR Value: ");    
  Serial.println(ldrValue);       // Print value to Serial Monitor
  delay(500);                     // Wait half a second
}