void setup() {
  // put your setup code here, to run once:
pinMode(13,OUTPUT);
pinMode(8, OUTPUT);
pinMode(4,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(4, HIGH);
  delay(1000);
  digitalWrite(4, LOW);
  delay(1000);
  for(int i=0; i<2; i=i+1){
    digitalWrite(8, HIGH);
    delay(500);
    digitalWrite(8,LOW);
    delay(500);
  }
  for(int i=0; i<3; i=i+1){
    digitalWrite(13, HIGH);
    delay(500);
    digitalWrite(13, LOW);
    delay(500);
  }
}