#include <Arduino.h>
#include <Keypad.h>

int Langkah;
const byte ROWS = 4;
const byte COLS = 3;
char keys[ROWS][COLS] = {{'1', '2', '3'}, {'4', '5', '6'}, {'7', '8', '9'}, {'*', '0', '#'}};
byte rowPins[ROWS] = {8, 7, 6, 5};
byte colPins[COLS] = {4, 3, 2};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(11, OUTPUT);
  lcd.backlight();
  Langkah = 0;
}

void loop() {
  lcd.print(key);
  for (int i = 0; i < key; i++) {
    for (int i = 0; i < 10; i++) {
      digitalWrite(13, HIGH);
      digitalWrite(12, LOW);
      Langkah += 1;
      lcd.print(Langkah);
      delay(0.5 * 1000);
      digitalWrite(13, LOW);
      digitalWrite(12, HIGH);
      Langkah += 1;
      lcd.print(Langkah);
      delay(0.5 * 1000);
    }
    digitalWrite(8, HIGH);
    Langkah += 1;
    lcd.print(Langkah);
    tone(11, 523);
    delay(0.5 * 1000);
  }
  tone(11, 523);
  lcd.clear();
}