const int trig = 2;
const int echo = 4;
const int led = 25;
long duration;
int distance;
void setup() {
	pinMode(trig, OUTPUT); 
	pinMode(echo, INPUT);
	Serial.begin(9600); 
	pinMode(led,OUTPUT);
}
void loop() {
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo, HIGH);
  distance = duration * 0.034 / 2;
  Serial.print("Distance: ");
  Serial.println(distance);
  if (distance<=200)
  {
  digitalWrite(led,HIGH);
  delay(1000);
  Serial.println("Indha Streetlight epdi ne eridhu?");
}
  else{
  digitalWrite(led,LOW);
  delay(1000);
  Serial.println("En area la velakku eriyala");
  }    
}