#include <LiquidCrystal.h>

const uint8_t RS_PIN = 12;
const uint8_t E_PIN  = 11;
const uint8_t D4_PIN = 10;
const uint8_t D5_PIN =  9;
const uint8_t D6_PIN =  8;
const uint8_t D7_PIN =  7;

LiquidCrystal lcd(RS_PIN, E_PIN, D4_PIN, D5_PIN, D6_PIN, D7_PIN);

const uint8_t CHAR_NUM_HORIZONTAL = 20;
const uint8_t CHAR_NUM_VERTIVAL   =  4;

void setup() {
  lcd.begin(CHAR_NUM_HORIZONTAL, CHAR_NUM_VERTIVAL);
  lcd.print("Welcome!");
}

void loop() {}