#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");
    digitalWrite(relaypin, LOW);
  }else
  {
    Serial.println("Its Night , TUrn On THe Light");
    digitalWrite(relaypin, HIGH);
    }
  delay(1000); // this speeds up the simulation
}