#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);
#define LED 15

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(115200);
  pinMode(LED, OUTPUT);
}

void loop() {
  delay(3000);
  digitalWrite(LED, HIGH);
  lcd.setCursor(0,0);
  lcd.println("lampu hidup!");
  delay(1500);
  digitalWrite(LED,LOW);
  lcd.setCursor(0,0);
  lcd.println("lampu mati!");
}