#include <LiquidCrystal_PCF8574.h>
#include <Wire.h>
//initialize the liquid crystal library
//the first parameter is the address
LiquidCrystal_PCF8574 lcd(0x27);

bool runComplete = false;
void setup() {
//initialize lcd screen
lcd.begin(16, 2);
// turn on the backlight
lcd.setBacklight(255);
}

void loop() {
  // put your main code here, to run repeatedly:

  if (!runComplete) {
    int sum = 0;
    for(int i = 1; i < 51; i ++) {
      lcd.setCursor(0,0);
      lcd.print(i);
      sum += i;
      lcd.setCursor(0, 1);
      lcd.print(sum);
      delay(500);
    }
    runComplete = true;
  }
  


}