// Make the text scroll from bottom to top in 16x2 LCD display, changing on button presses

#include <LiquidCrystal.h>

LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
char *list[] = {"Hello World!   ", "I am fine      ", "All is well    ", "Have a good day "};
int x;

void setup() 
{
  pinMode(5, INPUT);
  lcd.begin(16,2);
  display(x);
}

void loop() {
  if (digitalRead(4)) {
    x++;
    if(x > 3)
    x = 0;
    display(x);
  }
}

void display(int i)
{
  lcd.setCursor(0,1);
  lcd.write(list[i]);
  delay(250);
  lcd.setCursor(0,0);
  lcd.write(list[i]);
  lcd.setCursor(0,1);
  lcd.write("                 ");    
  delay(250);
}