int _ = _;
int _ = _;
int _ = _;

void setup()
{
  _(_, _);
  _(_, _);
  pinMode(_, OUTPUT);
}

void loop()
{
  //First LED
  _(_, HIGH);
  _(_);
  _(_, LOW);
  _(_);
  
  //Second LED
  _(_, HIGH);
  _(_);
  _(_, LOW);
  _(_);
  
  //Third LED
  _(_, HIGH);
  _(_);
  _(_, LOW);
  _(_);
  
  //All LEDs turn on and off simultaneously
  _(_, _);
  _(_, _);
  digitalWrite(_, HIGH);
  delay(_);
  _(_, _);
  _(_, _);
  digitalWrite(_, LOW);
  delay(_);
}