#include <Servo.h>
Servo myservo;

#define trig 12
#define echo 11

void setup() {
  // put your setup code here, to run once:
  myservo.attach(10);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  myservo.write(0);

  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

  long durasi = pulseIn(echo, HIGH);

  float jarak = durasi/58.0;  

  if (jarak <= 30){
  myservo.write(180);
  }

  delay(2000);
}