#include <LiquidCrystal_I2C.h>
const int ledmerah = 2;
const int ledhijau = 3;
int kolom = 16;
int baris = 2;

 LiquidCrystal_I2C lcd(0x27, kolom, baris);

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(ledmerah, OUTPUT);
  pinMode(ledhijau, OUTPUT);

  lcd.setCursor(0, 0);
  lcd.print("lampu led");
}

void loop() {
  digitalWrite(ledmerah, HIGH);
  digitalWrite(ledhijau, LOW);
  lcd.setCursor(0, 1);
  lcd.print("lampu merah on ");
  delay(2000);

  digitalWrite(ledmerah, LOW);
  digitalWrite(ledhijau, HIGH);
  lcd.setCursor(0, 1);
  lcd.print("lampu hijau on ");
  delay(2000);
  }