unsigned long myTime;

void setup() {
  Serial.begin(9600); // speed of transmission 
}

void loop() {
  Serial.print("Time: ");
  myTime = millis();
  Serial.println(myTime); // prints time since program started
  // delay(2000);          // wait a second so as not to send massive amounts of data
}



// Non-blocking Timing with millis() 

/*
unsigned long previousMillis = 0;
const long interval = 1000; // 1 seconds

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

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

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    Serial.print("Time: ");
    Serial.println(currentMillis);
  }
}
*/