// Definisikan pin untuk segmen A-G
int a = 2;
int b = 3;
int c = 4;
int d = 5;
int e = 6;
int f = 7;
int g = 8;

// Definisikan angka-angka untuk 7-segment display common anode (0-9)
byte angka[10][7] = {
  {LOW, LOW, LOW, LOW, LOW, LOW, HIGH},  // 0
  {HIGH, LOW, LOW, HIGH, HIGH, HIGH, HIGH}, // 1
  {LOW, LOW, HIGH, LOW, LOW, HIGH, LOW},    // 2
  {LOW, LOW, LOW, LOW, HIGH, HIGH, LOW},    // 3
  {HIGH, LOW, LOW, HIGH, HIGH, LOW, LOW},   // 4
  {LOW, HIGH, LOW, LOW, HIGH, LOW, LOW},    // 5
  {LOW, HIGH, LOW, LOW, LOW, LOW, LOW},     // 6
  {LOW, LOW, LOW, HIGH, HIGH, HIGH, HIGH},  // 7
  {LOW, LOW, LOW, LOW, LOW, LOW, LOW},      // 8
  {LOW, LOW, LOW, LOW, HIGH, LOW, LOW}      // 9
};

void setup() {
  // Atur semua pin sebagai OUTPUT
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
}

void tampilkanAngka(int num) {
  digitalWrite(a, angka[num][0]);
  digitalWrite(b, angka[num][1]);
  digitalWrite(c, angka[num][2]);
  digitalWrite(d, angka[num][3]);
  digitalWrite(e, angka[num][4]);
  digitalWrite(f, angka[num][5]);
  digitalWrite(g, angka[num][6]);
}

void loop() {
  // Hitung mundur dari 9 ke 0
  for (int i = 9; i >= 0; i--) {
    tampilkanAngka(i);  // Tampilkan angka
    delay(1000);        // Tunggu 1 detik sebelum angka berikutnya
  }
}