void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello");
  pinMode(23, OUTPUT);
  pinMode(32, INPUT_PULLUP);
  digitalWrite(23, LOW);
  
}

void togglePin(int pin) {
  static uint8_t pin_state = LOW;
  if (pin_state == LOW) {
    digitalWrite(pin, HIGH);
    pin_state = HIGH;
  } else {
    digitalWrite(pin, LOW);
    pin_state = LOW;
  }
}

bool check_button(int pin) {
  static bool pause = false;
  static bool res = false;
  static unsigned long time = 0;
  if((digitalRead(32) == LOW) && (!pause)) {
    res = !res;
    pause = true; 
    time = millis(); 
  } else if (pause) {
    if (millis() > time + 500) {
      pause = false;
    }
  }
  return res;
}

void loop() {
  uint8_t  start_blink = LOW;
  start_blink = check_button(32);

  if (start_blink == HIGH) {
    if (millis() % 500 == 0) {
      togglePin(23);
    }
  } else {
    digitalWrite(23, LOW);
  }
}