int dataPin = 11;
int clockPin = 12;
int latchPin = 8;


byte segments[8] = {
  0b00000001, // A
  0b00000010, // B
  0b00000100, // C
  0b00001000, // D
  0b00010000, // E
  0b00100000, // F
  0b01000000, // G
  0b10000000  // DP
};

void setup() {
  pinMode(dataPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
}

void loop() {

  for (int i = 0; i < 8; i++) {
    digitalWrite(latchPin, LOW);

    for (int b = 7; b >= 4; b--) {
      digitalWrite(clockPin, LOW);
      digitalWrite(dataPin, (segments[i] >> b) & 1);
      digitalWrite(clockPin, HIGH);
    }
    for (int b = 3; b >= 0; b--) {
      digitalWrite(clockPin, LOW);
      digitalWrite(dataPin, (segments[i] >> b) & 1);
      digitalWrite(clockPin, HIGH);
    }

    digitalWrite(latchPin, HIGH);
    delay(300);
  }

  delay(1000);

  for (int i = 7; i >= 0; i--) {
    digitalWrite(latchPin, LOW);

    for (int b = 7; b >= 4; b--) {
      digitalWrite(clockPin, LOW);
      digitalWrite(dataPin, (segments[i] >> b) & 1);
      digitalWrite(clockPin, HIGH);
    }
    for (int b = 3; b >= 0; b--) {
      digitalWrite(clockPin, LOW);
      digitalWrite(dataPin, (segments[i] >> b) & 1);
      digitalWrite(clockPin, HIGH);
    }

    digitalWrite(latchPin, HIGH);
    delay(300);
  }

  delay(1000);
}