#include <SPI.h>

enum { reg = 8 };

void setup() {
  SPI.begin();
  pinMode(reg, OUTPUT);
}

void loop() {
  static uint8_t digit[16] = {
    0x92, 0x82, 0xf8, 0x80, 
    0x90, 0x88, 0x83, 0xc6, 
    0xa1, 0x86, 0x8e };

  for (int i = 0; i < 16; i++) {
    digitalWrite(reg, LOW);
    SPI.transfer(digit[i]);
    digitalWrite(reg, HIGH);
    delay(1000);
  }

  digitalWrite(reg, LOW);
  SPI.transfer(0xff);
  digitalWrite(reg, HIGH);
  delay(1000);
}