// 22.11.4562 - MUHAMMAD GUIDO AUGUSTA

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16,2);
int Li = 17, Lii = 1, Ri = -1, Rii = -1;

void setup() {
  // put your setup code here, to run once:
  lcd.init();
  lcd.backlight();
  lcd.begin(16,2);
}

void loop() {
  // put your main code here, to run repeatedly:
  lcd.setCursor(0, 0);
  lcd.print(Scroll_LCD_Right("Selamat Datang"));
  delay(200);

  lcd.setCursor(0, 1);
  lcd.print(Scroll_LCD_Left("Universitas Amikomn Yogyakarta"));
  delay(200);
}

String Scroll_LCD_Left(String StrDisplay){
  String result;
  String StrProcess = "                " + StrDisplay + "                ";
  result = StrProcess.substring(Li, Lii);
  Li++;
  Lii++;
  if (Li > StrProcess.length()){
    Li = 16;
    Lii = 0;
  }
  return result;
}

String Scroll_LCD_Right(String StrDisplay){
  String result;
  String StrProcess = "                " + StrDisplay + "                ";
  if (Ri < 1){
    Ri = StrProcess.length();
    Rii = Ri-16;
  }
  result = StrProcess.substring(Ri, Rii);
  Ri--;
  Rii--;
  return result;
}