const int LDRPin = A0;            // Analog pin connected to LDR-resistor junction
const int lightControlPin = 7;    // Digital pin to control LED

int threshold = 600;              // Threshold value to determine light or dark (adjust by calibration)

void setup() {
  Serial.begin(9600);
  pinMode(lightControlPin, OUTPUT);
}

void loop() {
  int sensorValue = analogRead(LDRPin);
  Serial.println(sensorValue);
  
  if (sensorValue < threshold) {  // Dark condition (LDR resistance high, voltage low)
    digitalWrite(lightControlPin, HIGH);   // Turn LED ON
  } else {
    digitalWrite(lightControlPin, LOW);    // Turn LED OFF
  }
  
  delay(1000);  // Wait 1 second before reading again
}