// Pin mapping for 7-segment display (for common cathode)
const int segmentPins[] = {2, 3, 4, 5, 6, 7, 8};  // A, B, C, D, E, F, G
const int digitPins[] = {9, 10, 11};          // DIG1, DIG2, DIG3

// Segment patterns for digits 0-9
const byte digitPatterns[10] = {
  B00111111, // 0
  B00000110, // 1
  B01011011, // 2
  B01001111, // 3
  B01100110, // 4
  B01101101, // 5
  B01111101, // 6
  B00000111, // 7
  B01111111, // 8
  B01101111  // 9
};

void setup() {
  // Set segment pins and digit pins as output
  for (int i = 0; i < 7; i++) {
    pinMode(segmentPins[i], OUTPUT);
  }
  for (int i = 0; i < 3; i++) {
    pinMode(digitPins[i], OUTPUT);
  }

  // Turn off all digits initially
  for (int i = 0; i < 3; i++) {
    digitalWrite(digitPins[i], HIGH);
  }
}

void loop() {
  // Display specific numbers: 000, 111, 222, ..., 999
  for (int count = 0; count < 10; count++) {
    output(count); // Display each number in the sequence
    delay(1000); // Wait for 1 second for each number to be visible
  }
}

// Function to output the same digit across all 3 digits
void output(int number) {
  // Set segments for the current number
  for (int j = 0; j < 7; j++) {
    digitalWrite(segmentPins[j], (digitPatterns[number] >> j) & 0x01);
  }

  // Turn on all digits to show the current number
  for (int i = 0; i < 3; i++) {
    digitalWrite(digitPins[i], LOW);  // Turn on current digit
  }
  
  // Keep the digits display on for 1 second
  delay(1000);

  // Turn off all digits after displaying
  for (int i = 0; i < 3; i++) {
    digitalWrite(digitPins[i], HIGH); // Turn off current digit
  }
}