/*
  Forum: https://forum.arduino.cc/t/lcd-not-working-well/1210221
  Wokwi: https://wokwi.com/projects/386742125987512321
*/

#include <LiquidCrystal.h>

int RS = 7;
int E = 8;
int D4 = 9;
int D5 = 10;
int D6 = 11;
int D7 = 12;

bool turn = true;
long timer = 0;

byte hart[] = {
  B00000,
  B01010,
  B11111,
  B11111,
  B11111,
  B01110,
  B00100,
  B00000
};

LiquidCrystal lcd(RS, E, D4, D5, D6, D7);

void setup() { 
  lcd.begin(16, 2);  
  lcd.createChar(0, hart);
  lcd.setCursor(1, 0);
  lcd.write(byte(0));
  lcd.setCursor(2, 0);
  lcd.print(" Happy");
  lcd.setCursor(9, 0);
  lcd.write(byte(0));
  lcd.setCursor(0, 1);
  lcd.print("Mother Day!");
}

void loop() {
  if(turn) lcd.scrollDisplayRight();
  else lcd.scrollDisplayLeft();
  if(timer > 3) {
    turn = !turn;
    timer = 0;
  }
  delay(200);
  timer += 1;
}