void setup() {
pinMode(13, OUTPUT);
pinMode(11, OUTPUT);
pinMode(9, OUTPUT);
}

void loop() {
digitalWrite(13, HIGH);
digitalWrite(11, LOW);
digitalWrite(9, LOW);
delay(1000);

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

digitalWrite(13, LOW);
digitalWrite(11, LOW);
digitalWrite(9, HIGH);
delay(1000);

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