void setup() {
  for (int i = 0; i < 6; i++) {
    pinMode(i, OUTPUT);
  }
}
void loop() {
  for (int i = 0; i < 6; (i++)) {
    for (int Led = 0; Led < 1; Led++) {
      digitalWrite(i, HIGH);
      delay(100);
      digitalWrite(i, LOW);
      delay(100);
    }
  }
}