void setup() {
  pinMode(13, OUTPUT);
 pinMode(12, OUTPUT);
 pinMode(8,OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(13,LOW);
  delay(1000);
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(13,LOW);
  delay(1000);
  digitalWrite(12, HIGH);
  delay(1000);
  digitalWrite(12,LOW);
  delay(1000);
  digitalWrite(12, HIGH);
  delay(1000);
  digitalWrite(12,LOW);
  delay(1000);
  digitalWrite(8, HIGH);
  delay(1000);
  digitalWrite(8,LOW);
  delay(1000);
  digitalWrite(8, HIGH);
  delay(1000);
  digitalWrite(8,LOW);
  delay(1000);

}