#include <LiquidCrystal.h>

int ledM = 9;
int ledH = 7;
int trig = 11;
int echo = 10;
long duration , distance;
LiquidCrystal lcd(4,0,3,2,1,8);

void setup(){
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(ledM, OUTPUT);
  pinMode(ledH, OUTPUT);
  lcd.begin(16,2);
  lcd.setCursor(0,0);
  lcd.print("David Hingkoil");
  delay(2000);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("jarak =");
}

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

  duration = pulseIn(echo, HIGH);
  distance = duration /58;

  if(distance < 50){
    digitalWrite(ledM, HIGH);
    digitalWrite(ledH, LOW);
  }
else{
  digitalWrite(ledM, LOW);
  digitalWrite(ledH, HIGH);
}
delay(2000);
delay(50);
lcd.setCursor (7,0);
lcd.print(distance);
lcd.println("cm");
}