正常由左而右1秒，按下由右而左0.3秒，放開又正常左而右

 int unsigned long time1 = 0;

int unsigned long time2 = 0;

int sw = 10;

int led_pin = 13;

int led[] = {2, 3, 4, 5, 6, 7, 8, 9};

int debounce_delay = 100;

int val;

int i;

int j = 7;

int direct = 0;

void setup()

{

  pinMode(led_pin, OUTPUT);

  pinMode(sw, INPUT);

  digitalWrite(sw, HIGH);

  for (int i = 0; i < 8; i++)

  {

    pinMode(led[i], OUTPUT);

  }

}

void loop()

{

  for (i = 0; i < 8; i++)

  {

    digitalWrite(led[i], LOW);

  }

  if (millis() - time1 > 500)

  {

    time1 - millis();

    digitalWrite(led_pin, HIGH); delay(500);

    digitalWrite(led_pin, LOW); delay(500);

  }

  val = digitalRead(sw);

  if (val == LOW)

  {

    if (millis() - time2 > 1000)

    {

      digitalWrite(led[j], HIGH);

      delay(300);

      if (j == 7)

        j = 0;

      else

        j++;

    }

  }

  else

  {

    digitalWrite(led[j], HIGH);

    delay(1000);

    if (j == 0)

      j = 7;

    else

      j--;

  }

}