#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);
int buzzer = 7;
int led = 8;

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(buzzer, OUTPUT);
  pinMode(led, OUTPUT);
}

void loop() {
  lcd.setCursor(16,0);
  lcd.print("Warning! Perhatian khusus!");
  lcd.scrollDisplayLeft();
  delay(250);

  // Efek bunyi + LED berkedip
  digitalWrite(led, HIGH);
  tone(buzzer, 1200);
  delay(150);
  digitalWrite(led, LOW);
  noTone(buzzer);
  delay(150);
}