// Pin assignments for the segments (A to G + optional DP)
const int segmentPins[] = {2, 3, 4, 5, 6, 7, 8, 9}; // DP on Pin 9 (optional)
const int digitPins[] = {10, 11, 12}; // Common pins for each digit

// Number patterns for the segments (bit pattern for 0-9)
const byte numberPatterns[] = {
  0b00111111, // 0
  0b00000110, // 1
  0b01011011, // 2
  0b01001111, // 3
  0b01100110, // 4
  0b01101101, // 5
  0b01111101, // 6
  0b00000111, // 7
  0b01111111, // 8
  0b01101111  // 9
};

// Declare the setNumber function prototype
void setNumber(int number);

void setup() {
  // Set segment pins as outputs
  for (int i = 0; i < 8; i++) {  // Including DP on Pin 9
    pinMode(segmentPins[i], OUTPUT);
  }

  // Set digit pins as outputs
  for (int i = 0; i < 3; i++) {
    pinMode(digitPins[i], OUTPUT);
  }
}

void loop() {
  // Display numbers from 1 to 9
  for (int number = 1; number <= 9; number++) {
    // Calculate the current digit index
    int digitIndex = (number - 1) % 3; // 0, 1, or 2 for the three digits

    // Turn on the corresponding digit
    digitalWrite(digitPins[digitIndex], HIGH);

    // Set the segments for the current number
    setNumber(number);  // Display the current number (1 to 9)

    // Delay to allow the digit to show
    delay(1000);

    // Turn off the digit before moving to the next one
    digitalWrite(digitPins[digitIndex], LOW);
  }
}

// Set the segments for the given number
void setNumber(int number) {
  byte pattern = numberPatterns[number];
  for (int i = 0; i < 7; i++) {
    if (pattern & (1 << i)) {
      digitalWrite(segmentPins[i], LOW);  // Turn ON for common anode
    } else {
      digitalWrite(segmentPins[i], HIGH);  // Turn OFF for common anode
    }
  }

  // Control DP (set LOW to turn on for common anode, HIGH for common cathode)
  digitalWrite(segmentPins[7], HIGH);  // Keep DP off (adjust if you want it on)
}