#include <Servo.h>

Servo servo;

long waktu;
int jarak;

const int echoPin = 2;
const int trigPin = 3;

void setup() {
  servo.attach(11);
  servo.write(0);

  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);

}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  waktu = pulseIn(echoPin, HIGH, 30000);

  jarak = waktu * 0.034 / 2;

  if (jarak <= 10) {
    servo.write(180);
  } else {
    servo.write(0);
  }
  delay(20);
}