#define relaypin 18
#define ldrpin 5
void setup() {
  // put your setup code here, to run once:
  pinMode(relaypin, OUTPUT);
  pinMode(ldrpin, INPUT);
  Serial.begin(115200);
  Serial.println("Smart Street Light");
  delay(1000);
}

void loop() {
  int val = digitalRead(ldrpin);
  if(val == 0)
  {
    Serial.println("Its Day , turn off Light");
  }else
  {
    Serial.println("Its Night, Turn On Light");
  }
  delay(10); // this speeds up the simulation
}