#define top 2

#define topRight 3

#define bottomRight 4

#define bottom 5

#define bottomLeft 6

#define topLeft 7

#define center 8

 

int pins[] = {2, 3, 4, 5, 6, 7, 8};

 

void clear() {

  for (int i = 0; i < sizeof(pins); i++) {

    digitalWrite(pins[i], HIGH);

  }

}

 

void setup() {

  for (int i = 0; i < sizeof(pins); i++) {

    clear();

    pinMode(pins[i], OUTPUT);

  }

}

 

void pause() {

  delay(3000);

  clear();

}

 

void letterA() {

  digitalWrite(2, LOW);

  digitalWrite(3, LOW);

  digitalWrite(4, LOW);

  digitalWrite(6, LOW);

  digitalWrite(7, LOW);

  digitalWrite(8, LOW);

}

 

void letterB()

  {for (int i = 0; i < sizeof(pins); i++) {

    digitalWrite(pins[i], LOW);

  }

}

 

void letterC() {

  digitalWrite(2, LOW);

  digitalWrite(5, LOW);

  digitalWrite(6, LOW);

  digitalWrite(7, LOW);

}

 

void loop() {

  letterA();

  pause();

  letterB();

  pause();

  letterC();

  pause();

}