const int LATCH_PIN = 11;  // 74HC595 pin 12 STCP
const int DATA_PIN = 10;  // 74HC595pin 14 DS
const int CLOCK_PIN = 12;  // 74HC595 pin 11 SHCP
const int Aff=40;
const int DIG2 = 5;// dizaine units
const int DIG1 = 4;  //unité digit 

void setup() {
  
  
  pinMode(DIG2, OUTPUT);
  pinMode(DIG1, OUTPUT);
  
  
 
  pinMode(LATCH_PIN, OUTPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  pinMode(DATA_PIN, OUTPUT);
  // The following line primes the random number generator.
  // It assumes pin A3 is floating (disconnected):

}

const uint8_t digitTable[] = {
  0b00111111,
  0b00000110,
  0b01011011,
  0b01001111,
  0b01100110,
  0b01101101,
  0b01111101,
  0b00000111,
  0b01111111,
  0b01101111,
};
const uint8_t DASH = 0b01000000;


unsigned long TpDis;
bool dig2ToDisplay;

void display2Digits (uint8_t dig1, uint8_t dig2) {
unsigned long int tc = millis() ; 

  if (tc-TpDis>Aff);
  {

      if (dig2ToDisplay == true)
        {
        digitalWrite(DIG1, HIGH);
        digitalWrite(LATCH_PIN, LOW);
        shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, dig2);
        digitalWrite(LATCH_PIN, HIGH);
        digitalWrite(DIG2, LOW);
        }
        
        else
      {
        digitalWrite(DIG2, HIGH);
        digitalWrite(LATCH_PIN, LOW);
        shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, dig1);
        digitalWrite(LATCH_PIN, HIGH);
        digitalWrite(DIG1, LOW);
      } 
    TpDis= millis();
    dig2ToDisplay = !dig2ToDisplay;
    
 }

}

void loop() 
{

for (uint64_t i=0; i<100000;i++)
{
  uint64_t j=i/10000;
  display2Digits(digitTable[j], digitTable[9-j]);
}
}