Arduino Binary Counter 0-255

//Arduino Binary Counter 0-255
int ledPin[] ={5, 3, 4, 7, 10, 11, 12, 13};
int maxCount = 256;
int timer = 500;

void setup()
{
  for(int i= 0; i < 9; i++)
  {
    pinMode(ledPin[i], OUTPUT);
  }
}
void loop()
{
  for(int counter = 0; counter < maxCount; counter++)
  {
    displayBinary(counter);
    delay(timer);
  }
}
void displayBinary(byte numToShow)
{
  for(int i= 0; i < 8; i++)
  {
    if(bitRead(numToShow, i)==1)
    {
     digitalWrite(ledPin[i], HIGH);
    }
    else
    {
     digitalWrite(ledPin[i], LOW);
    }
  }

}