const int ledPin=12;
const int ldrPin=A0;
void setup() {
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(ldrPin, INPUT);
}
void loop() {
  int ldr= analogRead(ldrPin);
  if (ldr <= 250){
    digitalWrite(ledPin, HIGH);
    Serial.print("Its DARK, Turn on the LED : ");
    Serial.println(ldr);
  } else{
    digitalWrite(ledPin, LOW);
    Serial.print("Its LIGHT, Turn off the LED : ");
    Serial.println(ldr);
  }
}