#include <LiquidCrystal_I2C.h>

// global variables
int i = 0;

// objects
LiquidCrystal_I2C LCD(0x3F, 16, 2);

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  
  // initialize LCD
  LCD.init();
  LCD.backlight();
  LCD.print("  Hello, Wokwi! ");
  LCD.setCursor(0, 1);
  LCD.print("   1234567890   ");

  // initialize serial monitor
  Serial.begin(115200);
  Serial.println("Hello, World!");
}

void loop() {
  // blink test with LED
  digitalWrite(LED_BUILTIN, HIGH);
  LCD.backlight();
  delay(1000);
  digitalWrite(LED_BUILTIN, LOW);
  LCD.noBacklight();
  delay(1000);

  // print stuff on the serial monitor
  Serial.println(i);
  i++;
}