#include <Servo.h>
Servo servodhimas; //variable bebas
long jarak, waktu;

void setup(){
  pinMode (13,OUTPUT );
  pinMode (12, INPUT);
  servodhimas.attach(3);
  Serial.begin(9600);
}
void loop(){
  digitalWrite(13,LOW);
  delayMicroseconds(2);
  digitalWrite(13,HIGH);
  delayMicroseconds(10);
  digitalWrite(13,LOW);

  waktu=pulseIn (12,HIGH);
  jarak=0.034/2*waktu;
  if (jarak<20){
    servodhimas.write(90);
    delay(1000);
  }
  if (jarak>20){
    servodhimas.write(0);
    delay(1000);
  }
}
//dhimas XI TAV