const int d1=8,d2=9,buzzer=A0;
int num[] = {0x40, 0x79, 0x24, 0x30, 0x19, 0x12, 0x02, 0x78, 0x00, 0x10};
int i,a,digit2;
void setup() {
  DDRD = 0xff;
  PORTD = num[0];
  pinMode(d1, OUTPUT);
  pinMode(d2, OUTPUT);
  pinMode(buzzer, OUTPUT);
}
void loop() {
  for (digit2=0;digit2<=2;digit2++){
    for(a=0;a<9;a++){
      if(digit2==2 && a==7){break;}
      for(i=0;i<=5;i++){
        digitalWrite(d1,LOW);
        PORTD = num[a];
        digitalWrite(d2,HIGH);
        delay(50);
        digitalWrite(d2,LOW);
        PORTD = num[digit2];
        digitalWrite(d1,HIGH);
        delay(50);
      }
    }
  }
    tone(buzzer,600);
    delay(300);
    noTone(buzzer);
  for(digit2=1;digit2>=0;digit2--){
    for(a=9;a>=0;a--){
       if(digit2==2 && a==11){break;}
      for(i=1;i<=3;i++){
        digitalWrite(d1,LOW);
        PORTD = num[a];
        digitalWrite(d2,HIGH);
        delay(50);
        digitalWrite(d2,LOW);
        PORTD = num[digit2];
        digitalWrite(d1,HIGH);
        delay(50);
      }
    }
  }
}