void setup() {
  pinMode(10, INPUT);

  for (int pin = 2; pin <= 9; pin++) {
    pinMode(pin, OUTPUT);
  }
}

void loop() {
  int btn = digitalRead(10);

  if (btn == HIGH) {
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
    digitalWrite(6, LOW);
    digitalWrite(7, HIGH);
    digitalWrite(8, LOW);
    digitalWrite(9, HIGH);
  } else {
    for (int pin = 2; pin <= 9; pin++) {
      digitalWrite(pin, LOW);
    }
  }
}