int delayVal = 1000;

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
  Serial.println("End setup");
}

// the loop function runs over and over again forever
void loop() {
  myBlink();
}

void myBlink() {
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  Serial.println("LED on");
  delay(delayVal);      // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  Serial.println("LED off");
  delay(delayVal);                       // wait for a second
}