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

int merah = 2;
int biru = 15;
String b1 = "PRAKTEK ESP32";
String b2 = "LCD - LED";
String b3a = "LED MERAH MENYALA";
String b4a = "LED BIRU PADAM";
String b3b = "LED MERAH PADAM";
String b4b = "LED BIRU MENYALA";

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(merah, OUTPUT);
  pinMode(biru, OUTPUT);}

void loop() {

  digitalWrite(merah, HIGH);
  digitalWrite(biru, LOW);
  lcd.clear();

  if (merah, HIGH){
    lcd.setCursor(0,0);
    lcd.print(b1);
    lcd.setCursor(0,1);
    lcd.print(b2);
    lcd.setCursor(0,2);
    lcd.print(b3a);
    lcd.setCursor(0,3);
    lcd.print(b4a);}

    delay(2000);

  digitalWrite(biru, HIGH);
  digitalWrite(merah, LOW);
  lcd.clear();

  if (biru,HIGH){
    lcd.setCursor(0,0);
    lcd.print(b1);
    lcd.setCursor(0,1);
    lcd.print(b2);
    lcd.setCursor(0,2);
    lcd.print(b3b);
    lcd.setCursor(0,3);
    lcd.print(b4b);}
    
    delay(2000);}