#include <LiquidCrystal.h>
LiquidCrystal lcd(36, 34, 32, 30, 28, 26);
int counter = 0;

void setup() {

  lcd.begin(16, 2);
  lcd.setCursor(5, 0);
  lcd.print("Hitung ");
  lcd.setCursor(7, 1);
  lcd.print(counter);
  pinMode(47, INPUT_PULLUP);
  pinMode(49, INPUT_PULLUP);
  pinMode(51, INPUT_PULLUP);
}

void loop() {
  int buttonA = digitalRead(47);
  int buttonB = digitalRead(49);
  int buttonC = digitalRead(51);

  if (buttonA == LOW) {
    counter++;
    lcd.setCursor(7, 1);
    lcd.print("   ");
    lcd.setCursor(7, 1);
    lcd.print(counter);
    delay(300);
  }

  if (buttonB == LOW) {
    counter--;
    lcd.setCursor(7, 1);
    lcd.print("   ");
    lcd.setCursor(7, 1);
    lcd.print(counter);
    delay(300);
  }

  if (buttonC == LOW) {
    counter=0;
    lcd.setCursor(7, 1);
    lcd.print("   ");
    lcd.setCursor(7, 1);
    lcd.print(counter);
    delay(300);
  }
  if (counter >= 5){
    for (int i=0;i<=5;i++){
      digitalWrite(39, HIGH);
      digitalWrite(41, HIGH);
      delay(200);
      digitalWrite(39, LOW);
      digitalWrite(41, LOW);
      delay(200);
    }
    digitalWrite(39, LOW);
    digitalWrite(41, LOW);
  }
}