int  digit[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d,
                  0x7c, 0x07, 0x7f, 0x6f
                 };
int digit1, digit2;
void setup() {
  for (int i = 12; i < 19; i++) {
    pinMode(i, OUTPUT);
  }
  pinMode(5, OUTPUT);//digit1
  pinMode(19, OUTPUT);//digit2
}
void loop() {
  for (int x = 100; x >= 0; x--) {
    digit2 = x / 10;
    digit1 = x % 10;
    for (int k = 0; k < 20; k++) {
      digitalWrite(5, 0);
      digitalWrite(19, 1);
      dis(digit2);
      delay(10);
      digitalWrite(5, 1);
      digitalWrite(19, 0);
      dis(digit1);
      delay(10);
    }
  }
}
void dis(int num) {
  for (int a = 12; a < 19; a++) {
    digitalWrite(a, bitRead(digit[num], a - 12));
  }
}