int ldr = A0;
int led = 12;
void setup() {
  pinMode(ldr, INPUT);
  Serial.begin(9600);

  // put your setup code here, to run once:

}

void loop() {
  int ldr_value = analogRead(ldr);
  Serial.println(ldr_value);
  if(ldr_value>700){
    digitalWrite(led,HIGH);
    Serial.println("dark mode");
    delay(1000);
    }
    if(ldr_value<700)
    {
      digitalWrite(led, LOW);
      Serial.println("light mode");
      delay(1000);
    }
  // put your main code here, to run repeatedly:

}