void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
 pinMode(14, OUTPUT);
 pinMode(27, OUTPUT);
 pinMode(5, OUTPUT);
}

void loop() {
 digitalWrite(14, HIGH);
 delay(100);
 digitalWrite(14, LOW);
 float duration = pulseIn(27,HIGH);
 int distance = duration*0.034/2;
 Serial.println(distance);
 {
  if(distance<=200)
  {
    digitalWrite(5, HIGH);
  }
else{
  digitalWrite(5, LOW);
}
 }
}