// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
 PORTA.DIR = 1;
}

// the loop function runs over and over again forever
void loop() {
  PORTA.OUT = 2;   // turn the LED on (HIGH is the voltage level)
  delay(200);                       // wait for a second
  PORTA.OUT = 0;   // turn the LED on (HIGH is the voltage level)
  delay(200);                       // wait for a second
}