#include <LiquidCrystal_I2C.h>
int digitalPin1 = A0;
int button = 0;
int i = 0;
LiquidCrystal_I2C lcd(0x27,20,4);

void setup() {
  pinMode(button, INPUT);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
}

void loop(){
  button = digitalRead(digitalPin1);
 if (button == HIGH) {
   i=i+1;
   lcd.println(i);
 }
}