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

}

void loop() {
  // put your main code here, to run repeatedly:
int i;
for(i=1;i<=3;i++){
digitalWrite(13, HIGH);
delay(100);
digitalWrite(13, LOW);
delay(100);
}for(i=1;i<=4;i++){
digitalWrite(13, HIGH);
delay(500);
digitalWrite(13, LOW);
delay(500);
}for(i=1;i<=3;i++){
digitalWrite(13, HIGH);
delay(100);
digitalWrite(13, LOW);
delay(100);
}
}