/*
  LiquidCrystal Library - scrollDisplayLeft() and scrollDisplayRight()

  The circuit:
 * LCD RS pin to digital pin 2
 * LCD Enable pin to digital pin 3
 * LCD D4 pin to digital pin 8
 * LCD D5 pin to digital pin 9
 * LCD D6 pin to digital pin 10
 * LCD D7 pin to digital pin 11
 * LCD R/W pin to ground
 * V0 (contrast) to ground 
 * K (kathode) to ground for backlight
 * A (anode) through a 220 ohm resistor to +5V
 * VSS to ground
 * VDD to +5V

 Library originally added 18 Apr 2008
 by David A. Mellis
 library modified 5 Jul 2009
 by Limor Fried (http://www.ladyada.net)
 example added 9 Jul 2009
 by Tom Igoe
 modified 22 Nov 2010
 by Tom Igoe
 modified 7 Nov 2016
 by Arturo Guadalupi
 Modified 2019 by Ian Juby for Robotics: Learn by building course 2, digital electronics (www.JetPackAcademy.com)

 This example code is in the public domain.

 https://www.arduino.cc/en/Reference/LiquidCrystal

*/
#include <LiquidCrystal.h>

// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 2, en = 3, d4 = 8, d5 = 9, d6 = 10, d7 = 11;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("This is a message"); //Put whatever you want to display in the quotes. Note the length of the string, you'll need it.
  delay(1000);
}

void loop() {
  // scroll 17 positions (whatever your string length is) to the left
  // to move it offscreen left:
  for (int positionCounter = 0; positionCounter < 17; positionCounter++) {
    // scroll one position left:
    lcd.scrollDisplayLeft();
    // wait a bit:
    delay(150);
  }

  // scroll 33 positions (string length + display length) to the right
  // to move it offscreen right:
  for (int positionCounter = 0; positionCounter < 33; positionCounter++) {
    // scroll one position right:
    lcd.scrollDisplayRight();
    // wait a bit:
    delay(150);
  }

  // scroll 33 positions (display length + string length) to the left
  // to move it back to center:
  for (int positionCounter = 0; positionCounter < 16; positionCounter++) {
    // scroll one position left:
    lcd.scrollDisplayLeft();
    // wait a bit:
    delay(150);
  }

  // delay at the end of the full loop:
  delay(1000);

}