#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); 


int buttonState = 0;

int ketukan;

// Deklarasi pin Lampu
const int redLight = 13;
const int yellowLight = 12;
const int greenLight = 11;

const int buttonPin = 2;  // Deklarasi Button Pin
const int buzzerPin = 7;  // Deklarasi Buzzer Pin

void setup() {
  // put your setup code here, to run once:
  pinMode(redLight, OUTPUT); //Lampu Merah
  pinMode(yellowLight, OUTPUT); //Lampu Kuning
  pinMode(greenLight, OUTPUT); //Lampu Hijau

  pinMode(buttonPin, INPUT_PULLUP); //Button

  pinMode(buzzerPin, OUTPUT); //Buzzer

  
}

void loop() {
  // put your main code here, to run repeatedly:
  // Tampilan LCD Default
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.println("Dilarang");
  lcd.setCursor(0,1);
  lcd.println("Menyebrang");

  // Lampu Merah sebagai default
  digitalWrite(redLight, HIGH);

  buttonState =! digitalRead(buttonPin); // State untuk button sebelum ditekan

  if(buttonState == HIGH){

    // Menyalakan Lampu Kuning
    digitalWrite(redLight, HIGH);
    digitalWrite(yellowLight, HIGH);

    delay(1000);

    // Tampilan LCD Silakan Menyebrang
    lcd.init();
    lcd.backlight();
    lcd.setCursor(0, 0);
    lcd.print("Silakan");
    lcd.setCursor(0,1);
    lcd.println("Menyebrang");
    
    // Menganti ke Lampu Hijau
    digitalWrite(redLight, LOW);
    digitalWrite(yellowLight, LOW);
    digitalWrite(greenLight, HIGH);

    ketukan = 0; // deklarasi mulai ketukan buzzer

    // Banyak ketukan bunyi buzzer per 1 detik
    while(ketukan < 6){
      delay(700);
      tone(buzzerPin, 500);
      delay(100);
      noTone(buzzerPin);
      delay(100);
      tone(buzzerPin, 500);
      delay(100);
      noTone(buzzerPin);
      ketukan++;
    }
    
    // Mengembalikan tampilan ke default
    lcd.init();
    lcd.backlight();
    lcd.setCursor(0, 0);
    lcd.println("Dilarang");
    lcd.setCursor(0, 1);
    lcd.println("Menyebrang");

    // Mengganti ke Lampu Merah
    digitalWrite(greenLight, LOW);
    digitalWrite(redLight, HIGH);
    noTone(buzzerPin);
  }
}