#define HC06 Serial1
const int Delay = 100;
bool var = false;
int ledmin = 8;
int ledmax = 13;

void setup()
{
  delay(1000);
  Serial.begin(9600);

  // init module bluetooth
  HC06.begin(9600);

  // init sorties leds
  for (int i = 13; i >= 6; i--) {
    pinMode(i, OUTPUT);
  }
}

void loop() {
  while (HC06.available())
  {
    char data = HC06.read();
    Serial.write(data);

    if (data == 'A')
    {
      blink(true);
    }
    if (data == 'B')
    {
      blink(false);
    }
  }

}

void up(int led, int Delay) {
  digitalWrite(led, HIGH);
  delay(Delay);
}

void down(int led, int Delay) {
  digitalWrite(led, LOW);
  delay(Delay);
}

int blink(bool dir) {
  if (dir)
  {
    for (int j = ledmax; j >= ledmin; j--) {
      up(j, Delay);
    }

    for (int j = ledmax; j >= ledmin; j--) {
      down(j, Delay);
    }
  }
  else
  {
    for (int j = ledmin; j <= ledmax; j++) {
      up(j, Delay);
    }

    for (int j = ledmin; j <= ledmax; j++) {
      down(j, Delay);
    }
  }
}