unsigned long int t = millis() / 100;

void setup() {

  Serial.begin(9600);

  for (int i = 2; i < 14; i++) {
    pinMode(i, OUTPUT);
    digitalWrite(i, 1);
  }
  delay(1500);
  for (int i = 2; i < 14; i++) {
    digitalWrite(i, 0);
    delay(500);
  }

}

void power ( int number ) {
  int group = number / 2;
  bool ON = number % 2;
  if ( number == 99)
    for (int i = 2; i < 14; i++)
      digitalWrite(i, 1);

  switch ( group ) {
    case 0:
      for (int i = 2; i <= 5; i++)
        digitalWrite(i, ON);
      break;
    case 1:
      digitalWrite(8, ON);
      break;
    case 2:
      digitalWrite(9, ON);
      break;
    case 3:
      for (int i = 2; i <= 5; i++)
        digitalWrite(i, ON);
      break;
    case 4:
      digitalWrite(5, ON);
      break;
    case 5:
      for (int i = 2; i <= 5; i++)
        digitalWrite(i, ON);
      break;
    case 6:
      digitalWrite(9, ON);
      digitalWrite(4, ON);
      digitalWrite(5, ON);
      break;
    case 7:
      //28
      digitalWrite(3, ON);
      digitalWrite(4, ON);
      digitalWrite(5, ON);
      digitalWrite(5, ON);
      break;
    case 8:
      //36
      digitalWrite(4, ON);
      digitalWrite(5, ON);
      digitalWrite(5, ON);
      break;
    case 9:
      digitalWrite(6, ON);
      break;
    case 10:
      digitalWrite(3, ON);
      digitalWrite(4, ON);
      digitalWrite(5, ON);
      digitalWrite(7, ON);
      break;
    case 11:
      digitalWrite(4, ON);
      digitalWrite(5, ON);
      digitalWrite(9, ON);
      break;
    default:
      break;
  }
  t = millis() / 100;
}

void loop() {
  if ( Serial.available() > 0) {
    power(Serial.parseInt());
  } else {
    if ( millis() / 100 - t > 2000 )
      for (int i = 2; i < 14; i++)
        digitalWrite(i, 1);
  }
}