// Define pin numbers for each segment (a, b, c, d, e, f, g)
const int segmentPins[] = {2, 3, 4, 5, 6, 7, 8};

// Define the segments required to display numbers 0 to 9
const byte digitPatterns[] = {
  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 as OUTPUT
  for (int i = 0; i < 7; i++) {
    pinMode(segmentPins[i], OUTPUT);
  }
}

void loop() {
  for (int i = 0; i <= 9; i++) {
    displayNumber(i);
    delay(1000); // Display each number for 1 second
  }
}

void displayNumber(int number) {
  // Display the specified number on the seven-segment display
  if (number >= 0 && number <= 9) {
    byte segments = digitPatterns[number];
    for (int i = 0; i < 7; i++) {
      digitalWrite(segmentPins[i], bitRead(segments, i));
    }
  }
}