#define EVENTS_INTERVAL 1000
#define BLINK_ON 100
#define BLINK_OFF 400

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, HIGH);
  Serial.println("System Ready");
}

void loop() {
  // put your main code here, to run repeatedly:
  static uint32_t nextEvent = millis() + EVENTS_INTERVAL;
  static int32_t count = 0;
  // static __int24 count = 0;
  static uint32_t nextBlink = millis() + BLINK_ON;

  uint32_t now = millis();
  if (nextEvent < now) {
    uint32_t countCopy = count;
    Serial.print("Count = ");
    Serial.println(countCopy);
    nextEvent += EVENTS_INTERVAL;
    count = 0;
  }
  count++;

  if (nextBlink < now) {
    if (digitalRead(LED_BUILTIN)) {
      digitalWrite(LED_BUILTIN, LOW);
      nextBlink += BLINK_OFF;
    }
    else {
      digitalWrite(LED_BUILTIN, HIGH);
      nextBlink += BLINK_ON;
    }
  }
}