const int LDR_PIN = A0; 
const int LED_PIN = 13; 
int led = 

void setup() {
  pinMode(LDR_PIN, INPUT); 
  pinMode(LED_PIN, OUTPUT); 
  Serial.begin(9600);
}

void loop() {
  int lightLevel = analogRead(LDR_PIN);
  if (lightLevel >  60) { 
    digitalWrite(LED_PIN, HIGH); 
    Serial.println("night");
  } else {
    digitalWrite(LED_PIN, LOW); 
    Serial.println("day");
  }

  delay(1000); 
}