int num_array[10][7]={ {0,0,0,0,0,0,1}, //0
                       {1,0,0,1,1,1,1}, //1
                       {0,0,1,0,0,1,0}, //2
                       {0,0,0,0,1,1,0}, //3
                       {1,0,0,1,1,0,0}, //4
                       {0,1,0,0,1,0,0}, //5
                       {0,1,0,0,0,0,0}, //6
                       {0,0,0,1,1,1,1}, //7
                       {0,0,0,0,0,0,0}, //8
                       {0,0,0,1,1,0,0}}; //9
  void Num_Write(int);
  
  void setup() {
    pinMode(2, OUTPUT);
    pinMode(3, OUTPUT);
    pinMode(4, OUTPUT);
    pinMode(5, OUTPUT);
    pinMode(6, OUTPUT);
    pinMode(7, OUTPUT);
    pinMode(8, OUTPUT);
  }
  void loop() {

    for (int counter=10; counter > 0; --counter)
    {
      delay(1000);
      Num_Write(counter-1);
    }
    delay(3000);
  }

  void Num_Write(int number) {
    int pin= 2;
    for (int j=0; j < 7; j++) {
      digitalWrite(pin, num_array[number][j]);
      pin++;
    }
  }