// My first Arduino program: makes the little "L" light on the board
// blink in a heartbeat pattern (two quick blinks, then a pause).

// setup() runs once, when the board turns on.
void setup() {
  pinMode(LED_BUILTIN, OUTPUT);  // the built-in light is on pin 13
  Serial.begin(9600);            // lets the board send messages to the computer
  Serial.println("Hello from your Arduino!");
}

// loop() runs over and over, forever.
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);  // light ON
  delay(100);                       // wait 100 milliseconds (1/10 of a second)
  digitalWrite(LED_BUILTIN, LOW);   // light OFF
  delay(100);

  digitalWrite(LED_BUILTIN, HIGH);  // second quick blink
  delay(100);
  digitalWrite(LED_BUILTIN, LOW);
  delay(700);                       // longer pause before the next heartbeat

  Serial.println("thump-thump");
}