#include <LiquidCrystal_I2C.h>

int pinBoton1 = 2;
int pinBoton2 = 3;

LiquidCrystal_I2C lcd (0x27,20,4);

bool boton1 = false;
bool boton2 = false;

void miMenu(){
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Menu");

  lcd.setCursor(0,1);
  lcd.print("1. Numeros pares");

  lcd.setCursor(0,2);
  lcd.print("2. Numeros impares");

  lcd.setCursor(0,3);
  lcd.print("Selecciona opcion");
}

void setup() {
  pinMode(pinBoton1, INPUT);
  pinMode(pinBoton2, INPUT);

  lcd.init();

  lcd.backlight();

  miMenu();

}

void loop() {
  boton1 = digitalRead(pinBoton1);
  boton2 = digitalRead(pinBoton2);

  if(boton1 == HIGH){
    delay(250);
    lcd.clear();
    lcd.print("Presionaste Pares");
    delay(2000);
    miMenu();
  }
  if(boton2 == HIGH){
    delay(250);
    lcd.clear();
    lcd.print("Presionaste Impares");
    delay(2000);
    miMenu();
  }

}