#include <LiquidCrystal.h>

const int rs = 12, en = 11,d4 = 5,d5 = 4,d6 = 3,d7 = 2;

LiquidCrystal lcd(rs,en,d4,d5,d6,d7);

void setup(){
  lcd.begin(16,2);
  lcd.print("hello, world!");
  delay(1000);
}

void loop(){
  for (int positionCounter = 0;positionCounter < 13;
positionCounter++){
  lcd.scrollDisplayLeft();
  delay(150);
}
for (int positionCounter = 0;positionCounter < 29;
positionCounter++){
  lcd.scrollDisplayLeft();
  delay(150);
}
for (int positionCounter = 0;positionCounter < 16;
positionCounter++){
  lcd.scrollDisplayLeft();
  delay(150);
}
}