void setup() {
  // put your setup code here, to run once:
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly

  int time=100;

  digitalWrite(13,HIGH);
  delay(time);
  digitalWrite(13,LOW);
  delay(time);

  digitalWrite(12,HIGH);
  delay(time);
  digitalWrite(12,LOW);
  delay(time);

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

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

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

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

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

  digitalWrite(12,HIGH);
  delay(time);
  digitalWrite(12,LOW);
  delay(time);

}