void setup() {
  // put your setup code here, to run once:
pinMode(8, OUTPUT);
pinMode(10, OUTPUT);

pinMode(9, OUTPUT);
pinMode(11, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(8, HIGH);
digitalWrite(10, HIGH);

delay(1000);

digitalWrite(8, LOW);
digitalWrite(10, LOW);

delay(1000);

digitalWrite(9, HIGH);
digitalWrite(11, HIGH);

delay(1000);

digitalWrite(9, LOW);
digitalWrite(11, LOW);

delay(1000);

}