#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd (0x27,16,2);

#define led 3

const int buzzer = 9;
const int saklar = 10;

void setup(){

  lcd.init();
  lcd.backlight();
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(saklar, INPUT_PULLUP);
}

void loop(){

  int kondisi = digitalRead(saklar);
  lcd.clear();
  if(kondisi == 0){
    lcd.setCursor(0,0);
    lcd.print("GaGal");
    digitalWrite(buzzer, HIGH);
    digitalWrite(led, HIGH);
}
else{
  digitalWrite(buzzer, LOW);
  digitalWrite(led, LOW);
}
}