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;--const)
  {
    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++;
    }
  }