void setup() 
{
  pinMode(0, OUTPUT);
  pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
}

int step = -1;
int cycle = -1;
const int kSize = 4;
int k[kSize] = {1000, 500, 250, 100};

void loop() 
{
  ++step;
  step %= 10;
  if(step == 0)
  {
    ++cycle;
    if (cycle > kSize - 1)
    {
      cycle = 0;
    }
  }
  int bit_0 = step == 0 ? 1 : 0;
  int bit_1 = step == 1 ? 1 : 0;
  int bit_2 = step == 2 ? 1 : 0;
  int bit_3 = step == 3 ? 1 : 0;
  int bit_4 = step == 4 ? 1 : 0;
  int bit_5 = step == 5 ? 1 : 0;
  int bit_6 = step == 6 ? 1 : 0;
  int bit_7 = step == 7 ? 1 : 0;
  int bit_8 = step == 8 ? 1 : 0;
  int bit_9 = step == 9 ? 1 : 0;
 
  digitalWrite(0, bit_0);
  digitalWrite(1, bit_1);
  digitalWrite(2, bit_2);
  digitalWrite(3, bit_3);
  digitalWrite(4, bit_4);
  digitalWrite(5, bit_5);
  digitalWrite(6, bit_6);
  digitalWrite(7, bit_7);
  digitalWrite(8, bit_8);
  digitalWrite(9, bit_9);

  delay(k[cycle]);
}