int ldr_sensor = 35;
int led = 2;

void setup() {
  Serial.begin(9600);
  analogSetAttenuation(ADC_11db);
  pinMode(led, OUTPUT);
}

void loop() {
  int ldrvalue = analogRead(ldr_sensor);

  Serial.print ("Ldr Value= ");
  Serial.print (ldrvalue);

  if (ldrvalue < 40){
  Serial.println(" => Very Bright");
  digitalWrite(led, LOW);
} else if (ldrvalue < 800){
  Serial.println(" => Bright");
  digitalWrite(led, LOW);
} else if (ldrvalue < 2000){
  Serial.println(" => Light");
  digitalWrite(led, LOW);
} else if (ldrvalue < 3200){
  Serial.println(" => Dim");
  digitalWrite(led, HIGH);
} else {
  Serial.println(" => Dark");
  digitalWrite(led, HIGH);
}
  delay (1000);
  }