const int LDR_PIN=11;
const int LED_PIN=12;
void setup() {
  // put your setup code here, to run once:
pinMode(LDR_PIN, INPUT);
pinMode(LED_PIN, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 if (digitalRead(LDR_PIN) == LOW) {
    digitalWrite(LED_PIN,LOW);
  } 
   if (digitalRead(LDR_PIN) == HIGH) {
    digitalWrite(LED_PIN,HIGH);
  }
  delay(100);
}