const int runPin = 4;
const int resetPin = 2;

unsigned long run = 0;
unsigned long lastMillis = 0;
unsigned long detik = 0;
int resetState = 0;
int lastResetState =0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(runPin, INPUT_PULLUP);
  pinMode(resetPin, INPUT_PULLUP);

}

void loop() {
  // put your main code here, to run repeatedly:
  unsigned long currentMillis = millis();
  unsigned long detik = (run / 1000);
  resetState = digitalRead(resetPin);
  
  if (digitalRead(runPin) == LOW) {
    run += currentMillis - lastMillis;
    Serial.println(detik);
  }

  if (resetState == LOW && lastResetState == HIGH) {
    delay(50);
    run = 0;
    Serial.println("time reset!");
  }

  lastMillis = currentMillis;
  lastResetState = resetState;

  delay(500); // this speeds up the sim
}