void setup() 
{
  //intialize digital pin 13 as an output
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);

}

void loop()
{
  digitalWrite(13,HIGH);
  delay(1000);
  digitalWrite(13, LOW);
  delay(1000);

}