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
};
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);
  }
  else if (index == 22) {
    DDRB = 0b000000;
    DDRC = 0b000000;
    displayDigit(0);
  }
  else if (index == 23) {
    DDRB = 0b000000;
    DDRC = 0b000000;
    displayDigit(0);
  }
}
void LED_Step2() {
  if(ledIndex >=0 && ledIndex <=19){
    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 >=0 && 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);
              }
        }
      
  }
  else{
    if(ledIndex > 19 && ledIndex <= 20){
       for (int i = 0 ; i <9 ;i++){
        if ( i >= 0 && i<9){
          if ( i == 1){
          DDRB = DDRB|(1<<i);
          }
          else if (i == 3){
            DDRB = DDRB|(1<<i);
          }
          else if (i == 5){
            DDRB = DDRB|(1<<i);
          }
          else if (i == 7){
            DDRC = DDRC|(1<<1);
          }
        }    
      }
    }
    else if (ledIndex > 20 && ledIndex <= 21){
        turnOffLED(ledIndex); 
        for (int i = -1 ; i <9 ;i++){
          if ( i >= 0 && i<9){
            if ( i == 0){
              DDRB = DDRB|(1<<i);
            }
            else if ( i == 2){
              DDRB = DDRB|(1<<i);
            }
            else if ( i == 4){
              DDRB = DDRB|(1<<i);
            }
            else if ( i == 6){
              DDRB = DDRB|(1<<i);
            }
            else if ( i == 8){
              DDRC = DDRC|(1<<5);
            }
          }
        }
    }
    else if (ledIndex > 22 ){
      turnOffLED(ledIndex);
      ledIndex = 0;
    }
  }
}
void loop() {
  if (indexsegment == 16) {
    indexsegment = 0;
  }
  LED_Step2();
  displayDigit(sigmentCodes[indexsegment]);
  delay(1000);
  indexsegment += 1;
  ledIndex += 1;
}


// for( int i = 8;i<=0;i-- ){
//             if ( i == 7){
//           DDRC = DDRC|(1<<2);
//           }
//           else if (i == 4){
//             DDRB = DDRB|(1<<i);
//           }
//           else if (i == 2){
//             DDRB = DDRB|(1<<i);
//           }
//           else if (i == 0){
//             DDRB = DDRB|(1<<1);
//           }