#define INTERVAL_1 200 //1 วินาที

unsigned long time_1 = 0;

#define BUTTON_STOP 23
#define BUTTON_START 25
int LED_4 = 10; // กำหนดขา Pin LED 
int LED_3 = 11; // กำหนดขา Pin LED 
int LED_2 = 12; // กำหนดขา Pin LED 
int LED_1 = 13; // กำหนดขา Pin LED 

int START = 1; 
int STOP = 0; 

int count = 0; 

void setup() 
{
  Serial.begin(9600);
  pinMode(BUTTON_STOP, INPUT_PULLUP);
  pinMode(BUTTON_START, INPUT_PULLUP);

  pinMode(LED_1, OUTPUT);
  pinMode(LED_2, OUTPUT);
  pinMode(LED_3, OUTPUT);
  pinMode(LED_4, OUTPUT);
}

int lastState_STOP = HIGH;
int lastState_START = HIGH;

void loop() 
{
  Serial.print("START -> ");
  Serial.println(START);
  Serial.print("STOP -> ");
  Serial.println(STOP);
  int value_STOP = digitalRead((BUTTON_STOP));

  if (lastState_STOP != value_STOP) 
  {
    lastState_STOP = value_STOP;
    if (value_STOP == HIGH) 
    {
      Serial.println(" STOP released");
    }
    if (value_STOP == LOW) 
    {
      Serial.println(" STOP pressed");
      START = 0;
      STOP = 1;
    }
  }

  int value_START = digitalRead((BUTTON_START));

  if (lastState_START != value_START) 
  {
    lastState_START = value_START;
    if (value_START == HIGH) 
    {
      Serial.println(" START released");
    }
    if (value_START == LOW) 
    {
      Serial.println(" START pressed");
      START = 1;
      STOP = 0;
    }
  }

  if (START == 1 && STOP == 0)
  {
    Serial.println("LED -> BLINK");
    if(millis() - time_1 > INTERVAL_1)
    {
      time_1 = millis();
      count++;
    }
    if (count%8 == 0)
    {
      digitalWrite(LED_1, HIGH);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
    }
    else if (count%8 == 1)
    {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, HIGH);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
    }
    else if (count%8 == 2)
    {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, HIGH);
      digitalWrite(LED_4, LOW);
    }
    else if (count%8 == 3)
    {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, HIGH);
    }
    else if (count%8 == 4)
    {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, HIGH);
    }
    else if (count%8 == 5)
    {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, HIGH);
      digitalWrite(LED_4, LOW);
    }
    else if (count%8 == 6)
    {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, HIGH);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
    }
    else if (count%8 == 7)
    {
      digitalWrite(LED_1, HIGH);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
    }
    
  }
  else if (START == 0 && STOP == 1)
  {
    Serial.println("LED -> OFF");
  }
  else
  {
    Serial.println("LED -> NONE");
  }
}