#include <LiquidCrystal.h>
// rs,e,D0-D7
LiquidCrystal lcd(12,11,10,9,8,7);
const int btnPin = 2;
int n = 0;
void setup() {
lcd.begin(16,2);
pinMode(btnPin, INPUT);
}
void loop() {
bool btnState = digitalRead(btnPin);
if(btnState == HIGH){
lcd.setCursor(1,0);
lcd.print(n);
n++;
delay(500);
}
}