74HC164 7 Segment

#define data A5
#define clock A4

int digit1 = 5;
int digit2 = 6;
int digit3 = 7;

int count = 0;

byte zero  = B00010010;
byte one   = B11011110;
byte two   = B00010101;
byte three = B10010100;
byte four  = B11011000;
byte five  = B10110000;
byte six   = B00110000;
byte seven = B11010110;
byte eight = B00010000;
byte nine  = B11010000;
byte clrs  = B11111111;
byte night  = B00000001;
byte timer  = B11111110;

byte Digit[] = {B00010010, B11011110, B00010101, B10010100, B11011000, B10110000, B00110000, B11010110, B00010000, B11010000};
int i, j;
int DELAY = 5;

void setup() {
  pinMode(clock, OUTPUT);
  pinMode(data , OUTPUT);
  pinMode(digit1, OUTPUT);
  pinMode(digit2, OUTPUT);
}

void loop() {
  setDigit_(25);
}

int setDigit_(int D) {

  int unit, tens;
  if (D > 9) {
    unit = D % 10;
    tens = D / 10;
  }
  else
    unit = D;

  digitalWrite(digit2, LOW);
  shiftOut(data, clock, LSBFIRST, Digit[tens]);
  digitalWrite(digit1, HIGH);
  delay(DELAY);
  digitalWrite(digit1, LOW);
  shiftOut(data, clock, LSBFIRST, Digit[unit]);
  digitalWrite(digit2, HIGH);
  delay(DELAY);
}