// Arduino pins connected to the seven segment display
int pins[] = {2, 3, 4, 5, 6, 7, 8, 9};

// 0-9 for a common anode seven-segment display
byte numbers[] = {
  0b11000000, // 0
  0b11111001, // 1
  0b10100100, // 2
  0b10110000, // 3
  0b10011001, // 4
  0b10010010, // 5
  0b10000010, // 6
  0b11111000, // 7
  0b10000000, // 8
  0b10010000  // 9
};

void setup() {
  // Set all pins as outputs
  for (int i = 0; i < 8; i++) {
    pinMode(pins[i], OUTPUT);
  }
}

void loop() {
  // Cycle through numbers 0-9
  for (int i = 0; i < 10; i++) {
    showNumber(numbers[i]);
    delay(1000); // Wait for 1 second
  }
}

void showNumber(byte number) {
  for (int i = 0; i < 8; i++) {
    // Write each bit of the number to the appropriate pin
    digitalWrite(pins[i], bitRead(number, i));
  }
}