void setup() {
pinMode(12, OUTPUT);
pinMode(11, OUTPUT);
pinMode(8, OUTPUT);
}

void loop() {

digitalWrite(8, HIGH);
delay(8000);
digitalWrite(8, LOW);
delay(500);
digitalWrite(8, HIGH);
delay(300);
digitalWrite(8, LOW);
delay(500);
digitalWrite(8, HIGH);
delay(300);
digitalWrite(8, LOW);
digitalWrite(12, HIGH);
delay(3000);
digitalWrite(12, LOW);
digitalWrite(11, HIGH);
delay(8000);
digitalWrite(11, LOW);
delay(500);
digitalWrite(11, HIGH);
delay(300);
digitalWrite(11, LOW);
delay(500);
digitalWrite(11, HIGH);
delay(300);
digitalWrite(11, LOW);

}