#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,10,9, 8, 7);
unsigned long previousMillis = 0;
unsigned long interval = 1000;

int seconds = 0;
void setup() {
 lcd.begin(16,2);

 
}

void loop() {
   unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    seconds++;
    lcd.setCursor(2, 0);
    lcd.print(seconds);
  }
}