Timer with CD74HC164E and LED display 4-digits 7-segments

I decided to make a simple example to print on a 4-digit display by 74HC164 shift registers, because I couldn't find any examples of using these shift registers on the internet. I found examples that used the 74HD595 shift register but I needed the 74HC164.

https://www.facebook.com/fradut/videos/704017387419250/

I used an LFD039AUE-102A display, which has the internal diagram below:

I used 2 shift registers CD74HC164E:

The connection to Arduino UNO is as follows:

I used the following code to make the timer:

/*afisaj led*/
int clockPin = 8;
int dataPin  = 9;
unsigned long moment;
int zecm;
int unim;
int zecs;
int unis;
//Matricea digitilor - 0 la 9
byte num[] = {
 B00000011, // Zero
 B10011111, // One
 B00100101, // Two
 B00001101, // Three
 B10011001, // Four
 B01001001, // Five
 B01000001, // Six
 B00011111, // Seven
 B00000001, // Eight
 B00001001, // Nine
 B11111111, // None
};
byte dig[] = {
 B10000000, // One
 B01000000, // Two
 B00100000, // Three
 B00010000, // Four
};
byte nump[] = {
 B00000010, // Zero
 B10011110, // One
 B00100100, // Two
 B00001100, // Three
 B10011000, // Four
 B01001000, // Five
 B01000000, // Six
 B00011110, // Seven
 B00000000, // Eight
 B00001000, // Nine
};
void setup() {
 pinMode(clockPin, OUTPUT);
 pinMode(dataPin, OUTPUT);
}
void loop() {
 moment = millis();
 zecm = (moment / 600000) % 10;
 unim = (moment / 60000) % 10;
 zecs = ((moment % 60000) / 10000) % 10;
 unis = ((moment % 60000) / 1000) % 10;
 //zeci de secunde
 shiftOut(dataPin, clockPin, LSBFIRST, ~dig[0]);
 shiftOut(dataPin, clockPin, LSBFIRST, ~num[zecm]);
 delay(5);
 //secunde
 shiftOut(dataPin, clockPin, LSBFIRST, ~dig[1]);
 shiftOut(dataPin, clockPin, LSBFIRST, ~nump[unim]);
 delay(5);
 //zecimi de secunda
 shiftOut(dataPin, clockPin, LSBFIRST, ~dig[2]);
 shiftOut(dataPin, clockPin, LSBFIRST, ~num[zecs]);
 delay(5);
 //sutimi de secunda
 shiftOut(dataPin, clockPin, LSBFIRST, ~dig[3]);
 shiftOut(dataPin, clockPin, LSBFIRST, ~num[unis]);
 delay(5);
}