I've got an Arduino which works with the following basic example for blinking:

```
void setup() {
  pinMode(13, OUTPUT);
}
void loop() {
  digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
  delay(1000);                     // wait for a second
  digitalWrite(13, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                     // wait for a second
}

```

But if I add `Serial.println` it doesn't blink and doesn't output anything to the Serial moniter:

```
void setup() {
  pinMode(13, OUTPUT);
  Serial.begin(115200);
}
void loop() {
  Serial.println("Loop"); 
  digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
  delay(1000);                     // wait for a second
  digitalWrite(13, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                     // wait for a second
}

```

What am I doing wrong?