#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

int buzzerPin = 2;


void setup() {
  //put your setup code here, to run once:
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);

  lcd.init();
  lcd.backlight();

  Serial.begin(115200);
  pinMode(4, INPUT_PULLUP);
  lcd.setCursor(7, 1);
  lcd.print("Hijau!");
}

int counter = 0;
int lastState = HIGH;
int isNyebrang = 0;

void loop() {
  // put your main code here, to run repeatedly:
  noTone(buzzerPin);
  digitalWrite(10, LOW);
    digitalWrite(13, LOW);
  digitalWrite(11, HIGH);
  lcd.setCursor(7, 1);


  if (isNyebrang == 1) {
    delay(1000);

    lcd.clear();

    digitalWrite(12, HIGH);
    digitalWrite(11, LOW);
    lcd.setCursor(7, 1);
    lcd.print("KUNING!");
    delay(1000);
    lcd.clear();
    digitalWrite(12, LOW);
    digitalWrite(10, HIGH);
    digitalWrite(13, HIGH);

    tone(buzzerPin, 1000);
    lcd.setCursor(7, 1);
    lcd.print("Jalan");
    delay(1000);
    lcd.print("MERAH!");
    isNyebrang = 0;
    lcd.clear();
    lcd.print("Hijau!");
    delay("5000");
  }

  int value = digitalRead((4));
  if (lastState != value) {
    isNyebrang = 1;
  }
}