#define MSEC_IN_SEC  1000

const int tickDelay = 250;

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  uint32_t timeInMs = millis();
  uint8_t timeSecPassed = timeInMs / MSEC_IN_SEC;
  uint16_t timeMsPassed = timeInMs % MSEC_IN_SEC;
  
  Serial.print("Aega möödunud: ");
  Serial.print(timeSecPassed);
  Serial.print("s ");
  Serial.print(timeMsPassed);
  Serial.println("ms");
  
  delay(tickDelay);
}