const int pins[] = {2,3,4,5,6,7,8,9,10,11};
int counter =0;
void setup() {
  for(int i = 0;i<10;i++)
  {
    pinMode(pins[i], OUTPUT);
  }
}


void loop() {
  for(int i = 0; i<10; i++)
  {
      digitalWrite(pins[i],bitRead(counter,i)?HIGH:LOW);
  }

  counter++;
  delay(500);
}