#define LDR_PIN 2
int led=5;
void setup() {
 pinMode(LDR_PIN, INPUT);
 pinMode(led, OUTPUT);
 Serial.begin(9600);
}
void loop()
{
  if (digitalRead(LDR_PIN)==HIGH)
{
  Serial.println("Light");
  digitalWrite(led,LOW);
}
else
{
  Serial.println("Dark");
  digitalWrite(led, HIGH);
}
delay(100);
}