int ledIndex = 0;
int indexsegment = 0;
int format[] = {0b000000,0b000001, 0b000011, 0b000111, 0b001111, 0b011111, 0b111111, 0b100000, 0b100010};
const byte sigmentCodes[] = {
  0b01000000, // 0 -> 0x30,
0b01111001,   // 1 -> 0x39,
0b00100100,   // 2 -> 0x24,
0b00110000,   // 3 -> 0x0C,
0b00011001,   // 4 -> 0x19,
0b00010010,   // 5 -> 0x12,
0b00000010,   // 6 -> 0x02,
0b01111000,   // 7 -> 0x38,
0b00000000,   // 8 -> 0x00,
0b00010000,   // 9 -> 0x10,
0b00001000,   // A -> 0x08,
0b00000011,   // B -> 0x03,
0b01000110,   // C -> 0x46,
0b00100001,   // D -> 0x21,
0b00000110,   // E -> 0x06,
0b10001110    // F -> 0x8E

}; // F
void setup() {
  DDRD = 0xFF;
  DDRB = 0b000000;
  DDRC = 0b000000;
}
void displayDigit(byte digitCode) {
  PORTD = digitCode;
}
void turnOffLED(int index) {
  if (index == 9) {
    DDRB = 0b000000;
    DDRC = 0b000000;
    displayDigit(0);
  }
  else if (index == 19) {
    DDRB = 0b000000;
    DDRC = 0b000000;
    displayDigit(0);
  }
}
void LED_Step2() {
  if(ledIndex >=0 && ledIndex <=9){
      if(ledIndex <=6){
      DDRB = DDRB| format[ledIndex];
      }
      else if (ledIndex >= 7 && ledIndex <=8){
        DDRC = DDRC | format[ledIndex];
        }
      else if(ledIndex == 9){
           turnOffLED(ledIndex);
        }
      }
      else {
         if(ledIndex >=10 && ledIndex <=18 ){
            if(ledIndex <= 11 ){
                DDRC = (DDRC|(format[9]))|(~(1<<5));
              }
              else if (ledIndex >11 && ledIndex <=12){
                DDRC = format[8];
              }
              else if (ledIndex >12 && ledIndex <=13){
                DDRB = (DDRB & format[7])|(1<<5);
              }
              else if (ledIndex >13 && ledIndex <=14){
                DDRB = DDRB | (format[6])&((1<<4));
              }
              else if (ledIndex >14 && ledIndex <=15){
                DDRB = DDRB | (format[5])&((1<<3));
              }
              else if (ledIndex >15 && ledIndex <=16){
                DDRB = DDRB | (format[4])&((1<<2));
              }
              else if (ledIndex >16 && ledIndex <=17){
                DDRB = DDRB | (format[3])&((1<<1));
              }
              else if (ledIndex >17 && ledIndex <=18){
                DDRB = DDRB | (format[2])&((1<<0));
              }
            }
            else {
              turnOffLED(ledIndex);
              ledIndex = 0;
            }
        }
} 
void loop() {
  if (indexsegment == 16) {
    indexsegment = 0;
  }
  LED_Step2();
  displayDigit(sigmentCodes[indexsegment]);
  delay(300);
  indexsegment += 1;
  ledIndex += 1;
}