#include <LiquidCrystal.h>

LiquidCrystal lcd(27, 26, 25, 19, 18, 17);

void setup() {
  lcd.begin(16, 2);
  // you can now interact with the LCD, e.g.:
  
}

void loop() {
  lcd.setCursor(0,0);
  lcd.print("_");
  delay(500);
  lcd.setCursor(0,0);
  lcd.print(" ");
  delay(500);
}