#include <LiquidCrystal.h>
int button_1 = 2;
int button_2 = 4;

LiquidCrystal lcd(22,23,5,18,19,21);

void setup() {
  //Iniciar LCD
  lcd.begin(16,2); 

  pinMode(button_1, INPUT);
  pinMode(button_2, INPUT);
}

void loop() {

 if( digitalRead(button_1) == 1 ){
   lcd.print("Red Button");
   delay(300);
   lcd.clear();
 }
 if( digitalRead(button_2) == 1 ){
   lcd.print("Blue Button");
   delay(300);
   lcd.clear();
 }
}