const int latchPinSTCP = 4;
const int clockPinSHCP = 5;
const int dataPinDS = 3;

unsigned long previousMillis = 0;
uint16_t cislo = 0;

uint8_t segment[] = {1,2,4,8};

const uint8_t cifry[] = {  
0b00000011,   //  0
0b10011111,  	//  1
0b00100101,   //  2
0b00001101,   //  3
0b10011001,   //  4
0b01001001,   //  5
0b01000001,   //  6
0b00011111,   //  7
0b00000001,   //  8
0b00001001,   //  9
0b11111111    //  -
};

void setup() {
  pinMode(latchPinSTCP, OUTPUT);
  pinMode(dataPinDS, OUTPUT);  
  pinMode(clockPinSHCP, OUTPUT);
}

void loop() {
  zobraz(cislo);
  if(millis() - previousMillis >= 1000)
  {
    previousMillis = millis();
    cislo = (cislo + 1) %10;
  }
}

void zobraz(uint16_t cislo)
{
  digitalWrite(latchPinSTCP, LOW);
  shiftOut(dataPinDS, clockPinSHCP, LSBFIRST, cifry[cislo]);
  shiftOut(dataPinDS, clockPinSHCP, MSBFIRST, 15);
  digitalWrite(latchPinSTCP, HIGH);
}