int pins[] = {2, 3, 4, 5, 6, 7, 8, 9};
int zero_value[] = {0, 0, 0, 0, 0, 0, 1, 1};
int one_value[] = {1, 0, 0, 1, 1, 1, 1, 1};
int two_value[] = {0, 0, 1, 0, 0, 1, 0, 1};
int three_value[] = {0, 0, 0, 0, 1, 1, 0, 1};
int four_value[] = {1, 0, 0, 1, 1, 0, 0, 1};
int five_value[] = {0, 1, 0, 0, 1, 0, 0, 1};
int six_value[] = {0, 1, 0, 0, 0, 0, 0, 1};
int seven_value[] = {0, 0, 0, 1, 1, 1, 1, 1};
int eight_value[] = {0, 0, 0, 0, 0, 0, 0, 1};
int nine_value[] = {0, 0, 0, 0, 1, 0, 0, 1};

void zero() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], zero_value[i]);
}

void one() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], one_value[i]);
}

void two() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], two_value[i]);
}

void three() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], three_value[i]);
}

void four() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], four_value[i]);
}

void five() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], five_value[i]);
}

void six() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], six_value[i]);
}

void seven() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], seven_value[i]);
}

void eight() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], eight_value[i]);
}

void nine() {
  for (int i = 0; i < 8; i++)
    digitalWrite(pins[i], nine_value[i]);
}


void setup() {
  for (int i = 0; i < 8; i++) {
    pinMode(pins[i], OUTPUT);
  }
}

void loop() {
  zero();
  delay(500);
  one();
  delay(500);
  two();
  delay(500);
  three();
  delay(500);
  four();
  delay(500);
  five();
  delay(500);
  six();
  delay(500);
  seven();
  delay(500);
  eight();
  delay(500);
  nine();
  delay(500);

}