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

}

void loop() {
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
  delay(1000);
  digitalWrite(10, HIGH);
  digitalWrite(9, LOW);
  delay(1000);
  digitalWrite(10, HIGH);
  digitalWrite(9, LOW);
  delay(1000);

}