8 LED chase w/ one shift register

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

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

void loop() {
  for (int i = 0; i < 8; i++) {
    shiftOut(dataPin, clockPin, MSBFIRST, B00000001 << i);
    digitalWrite(latchPin, HIGH);
    delay(125);
    digitalWrite(latchPin, LOW);
  }

  for (int i = 0; i < 8; i++) {
    shiftOut(dataPin, clockPin, MSBFIRST, B10000000 >> i);
    digitalWrite(latchPin, HIGH);
    delay(125);
    digitalWrite(latchPin, LOW);
  }
}