/*
  II2C 1602 Variables Display
  Written July 27, 2020
  by R Jordan Keindler
*/

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display

int delay1 = 500;

void setup() {
  lcd.init(); // initialize the lcd
  lcd.backlight(); // Turn backlight On
}

void loop() {

  lcd.clear();
  lcd.setCursor(3, 0); // Set cursor at position three(3) on first line of 1602 LCD

  for (int i = 0; i <= 9; i++) {
    lcd.print(i); // Display succesive values of variable i
    delay(delay1); // Delay delay1 after each display of i
  }
  lcd.setCursor(3, 1); // Set cursor at position three(3) on 2nd line of 1602 LCD
  for (int i = 9; i >= 0; i--) {
    lcd.print(i); // Display succesive values of variable i
    delay(delay1); // Delay delay1 after each display of i
  }
}