// Pins for 7-segment display 1
int a1 = 2;
int b1 = 3;
int c1 = 4;
int d1 = 5;
int e1 = 6;
int f1 = 7;
int g1 = 8;

// Pins for 7-segment display 2
int a2 = 9;
int b2 = 10;
int c2 = 11;
int d2 = 12;
int e2 = 13;
int f2 = A0;
int g2 = A1;

// Define the common cathode 7-segment display patterns for numbers 0 to 9
byte numbers[10][7] = {
  {1,1,1,1,1,1,0}, // 0
  {0,1,1,0,0,0,0}, // 1
  {1,1,0,1,1,0,1}, // 2
  {1,1,1,1,0,0,1}, // 3
  {0,1,1,0,0,1,1}, // 4
  {1,0,1,1,0,1,1}, // 5
  {1,0,1,1,1,1,1}, // 6
  {1,1,1,0,0,0,0}, // 7
  {1,1,1,1,1,1,1}, // 8
  {1,1,1,0,0,1,1}  // 9
};

void setup() {
  // Initialize all the pins as OUTPUT
  pinMode(a1, OUTPUT);
  pinMode(b1, OUTPUT);
  pinMode(c1, OUTPUT);
  pinMode(d1, OUTPUT);
  pinMode(e1, OUTPUT);
  pinMode(f1, OUTPUT);
  pinMode(g1, OUTPUT);

  pinMode(a2, OUTPUT);
  pinMode(b2, OUTPUT);
  pinMode(c2, OUTPUT);
  pinMode(d2, OUTPUT);
  pinMode(e2, OUTPUT);
  pinMode(f2, OUTPUT);
  pinMode(g2, OUTPUT);
}

void displayNumber(int number) {
  int firstDigit = number / 10;
  int secondDigit = number % 10;

  // Display the first digit
  digitalWrite(a1, numbers[firstDigit][0]);
  digitalWrite(b1, numbers[firstDigit][1]);
  digitalWrite(c1, numbers[firstDigit][2]);
  digitalWrite(d1, numbers[firstDigit][3]);
  digitalWrite(e1, numbers[firstDigit][4]);
  digitalWrite(f1, numbers[firstDigit][5]);
  digitalWrite(g1, numbers[firstDigit][6]);

  // Display the second digit
  digitalWrite(a2, numbers[secondDigit][0]);
  digitalWrite(b2, numbers[secondDigit][1]);
  digitalWrite(c2, numbers[secondDigit][2]);
  digitalWrite(d2, numbers[secondDigit][3]);
  digitalWrite(e2, numbers[secondDigit][4]);
  digitalWrite(f2, numbers[secondDigit][5]);
  digitalWrite(g2, numbers[secondDigit][6]);
}

void loop() {
  // Display numbers from 0 to 99 in sequence
  for (int i = 0; i < 100; i++) {
    displayNumber(i);
    delay(1000); // Adjust the delay as needed
  }
}