#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(15, OUTPUT);
  lcd.begin(20, 4);
  lcd.init();
  lcd.backlight();

}

void loop() {

  for (int x = 0; x <= 19; x++) {
    switch (x) {
      case 16:
        lcd.setCursor(x, 0);
        lcd.print("Hell");
        delay(500);
        lcd.clear();
        break;
      case 17:
        lcd.setCursor(x, 0);
        lcd.print("Hel");
        delay(500);
        lcd.clear();
        break;
      case 18:
        lcd.setCursor(x, 0);
        lcd.print("He");
        delay(500);
        lcd.clear();
        break;
      case 19:
        lcd.setCursor(x, 0);
        lcd.print("H");
        delay(500);
        lcd.clear();
        break;
      default:
        lcd.setCursor(x, 0);
        lcd.print("Hell0");
        delay(500);
        lcd.clear();
        break;
    }
  }

}