void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(14, OUTPUT);
  pinMode(27, INPUT);
  pinMode(32, 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<=300)
{
  digitalWrite(32, HIGH);

}
else{
  digitalWrite(32,LOW);
}
}