const uint8_t segPins[8]   = {22,23,24,25,26,27,28,29};
const uint8_t digitPins[6] = {30,31,32,33,34,35};

// COMMON ANODE segment patterns (0 = segment ON, 1 = segment OFF)
uint8_t segCode[10] = {
    0b0000001, //0
    0b1001111, //1
    0b0010010, //2
    0b0000110, //3
    0b1001100, //4
    0b0100100, //5
    0b0100000, //6
    0b0001111, //7
    0b0000000, //8
    0b0000100  //9
};

void displayDigit(uint8_t digitValue, uint8_t position)
{
    // Disable all digits (common anode → HIGH = OFF)
    for (uint8_t i = 0; i < 6; i++)
        digitalWrite(digitPins[i], HIGH);

    uint8_t code = segCode[digitValue];

    // Write segment states
    for (uint8_t s = 0; s < 8; s++)
        digitalWrite(segPins[s], (code & (1 << s)) ? HIGH : LOW);

    // Enable selected digit (common anode → LOW = ON)
    digitalWrite(digitPins[position], LOW);

    delay(2);
}

void setup()
{
    for (uint8_t i = 0; i < 8; i++)
        pinMode(segPins[i], OUTPUT);

    for (uint8_t i = 0; i < 6; i++)
        pinMode(digitPins[i], OUTPUT);
}

void loop()
{
    static uint32_t number = 100000;  // start from 100000

    uint8_t d[6];
    uint32_t n = number;

    // Split digits (from right)
    for (int i = 5; i >= 0; i--) {
        d[i] = n % 10;
        n /= 10;
    }

    // multiplex all 6 digits
    for (uint8_t i = 0; i < 6; i++)
        displayDigit(d[i], i);

    // Increase number after full cycle
    number++;
    if (number > 999999)
        number = 100000;
}