void setup() {
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop() {
	digitalWrite(11, HIGH);
   	delay(5000);
  	digitalWrite(11, LOW);
  	digitalWrite(10, HIGH);
  	delay(2500);
  	digitalWrite(10, LOW);
  	digitalWrite(9, HIGH);
  	delay(5000);
  	digitalWrite(9, LOW);
}