int l1 =12;
int l2 =13;
int n =11;
int e =10;
long durasi,  jarak;
#include <LiquidCrystal.h>
LiquidCrystal lcd(6, 7, 2, 3, 4, 5);

void setup() {
  pinMode(l1, OUTPUT);
  pinMode(l2, OUTPUT);
  pinMode(n, OUTPUT);
  pinMode(e,  INPUT);
  Serial. begin(9600);
  lcd.begin(16, 2);
  lcd.setCursor(0,0);
  lcd.print("#1");
  delay(1);
  lcd.clear();
}
void loop(){
  digitalWrite(n, LOW);
  digitalWrite(e, HIGH);
  delayMicroseconds(8);
  digitalWrite(n, HIGH);
  delayMicroseconds(8);
  digitalWrite(e, LOW);
  delayMicroseconds(8);

  durasi = pulseIn(e, HIGH);
  jarak = (durasi/2)/29.1;

  if (jarak<100){
  digitalWrite(l1, HIGH);
  digitalWrite(l2, LOW); 
  } 
  else{
  digitalWrite(l1, LOW);
  digitalWrite(l2, HIGH); 
  }

  lcd.setCursor(0,0);
  lcd.print(" jarak :");
  lcd.print(jarak);
  lcd.print(" cm      ");
}