int seznam1[] = {1, 2, 16, 64, 128, 255, 1024, 2048};
int pin[] = {0, 1, 2, 3, 4, 5, 8, 9};

void setup() {
  Serial.begin(115200); // Uncomment if you want to use Serial
  //DDRD = 0xFF; // all pins are output
  for (int x = 0; x < 8; x++) {
    pinMode(pin[x], OUTPUT); // Corrected pinMode argument
  }
}

void loop() {
  static int index = 0;
  int i = seznam1[index]; 
  int m = sizeof(seznam1) / sizeof(seznam1[0]); 
  Serial.println(m);

  for (int x = 0; x < 8; x++) {
    int k = i & 0x01;
    digitalWrite(pin[x], k);
    i = i >> 1;
  }

  index++;
  if (index >= m) index = 0;
  delay(300);
}