const int dataPin = 11;
const int clockPin = 9;
const int latchPin = 12;

byte segments[8] = {
  0b00000001,
  0b00000010,
  0b00000100,
  0b00001000,
  0b00010000,
  0b00100000,
  0b01000000,
  0b10000000
};

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

void loop() {
  for (int i = 0; i < 8; i++) {
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, segments[i]);
    digitalWrite(latchPin, HIGH);
    delay(300);
  }
  
  delay(1000);
  
  for (int i = 7; i >= 0; i--) {
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, segments[i]);
    digitalWrite(latchPin, HIGH);
    delay(300);
  }
  
  delay(1000);
}