void setup() {
  pinMode( 6, OUTPUT);
  pinMode( 7, OUTPUT);
  pinMode( 8, OUTPUT);
  pinMode( 9, OUTPUT);
  pinMode( 10, OUTPUT);
  pinMode( 11, OUTPUT);

}

void loop() {
  digitalWrite( 6, HIGH);
  delay(500);
  digitalWrite( 6, LOW);
  delay(500);
  
  digitalWrite( 7, HIGH);
  delay(500);
  digitalWrite( 7, LOW);
  delay(500);

  digitalWrite( 8, HIGH);
  delay(500);
  digitalWrite( 8, LOW);
  delay(500);

  digitalWrite( 9, HIGH);
  delay(500);
  digitalWrite( 9, LOW);
  delay(500);

  digitalWrite( 10, HIGH);
  delay(500);
  digitalWrite( 10, LOW);
  delay(500);

  digitalWrite( 11, HIGH);
  delay(500);
  digitalWrite( 11, LOW);
  delay(500);

}