#include <Servo.h>

const int t = 2;
const int e = 3;
const int LED1 = 0;
const int LED2 = 1;

long jarak;
long waktu;

Servo servo;

void setup() {
  servo.attach(11);
  pinMode(t, OUTPUT);
  pinMode(e, INPUT);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);

}

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

  jarak = pulseIn(e, HIGH);

  waktu = jarak * 0.034 / 2;

  if(waktu <= 100) {
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, HIGH);
    servo.write(90);
  }  else {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    servo.write(0);
  }
}