Long Press Buton

#define button 3
#define buttonUp 4
#define buttonDown 5

#define relay 8

int Hours=0;
int Min=0;

boolean buttonPress = false ,bt_state = false ,longPress = false ;
long timerStart;
const long delay_long_press = 500;
const long delay_short_press = 270;
long lastDebounceTime = 0;

int x =0;
void setup()
{
 // Serial.begin(9600);
 pinMode(button,INPUT);
 pinMode(buttonUp,INPUT);
 pinMode(buttonDown,INPUT);
 pinMode(relay,OUTPUT);
}

void loop()
{
 if(digitalRead(button) == HIGH)
 {
  if (buttonPress == false)
  {
    buttonPress = true ;
    timerStart = millis();
  }
  if((millis() - timerStart > delay_long_press) && (longPress == false)) // check for long press
  {
    longPress = true ;
    bt_state = !bt_state;
  }
 }
 else
 {
  if (buttonPress == true)
  {
   if (longPress == true)
   {
    longPress = false ;
   }
   buttonPress = false ;
  }
 }

 if(bt_state == true)
 {
  if ((millis() - lastDebounceTime) > delay_short_press) // debounce for one press
  {
   if (digitalRead(button) == HIGH && buttonPress == true)
   {
    x++;
    if(x > 2)
    {
     x = 0 ;
    }
   }
   adjust_time(x);
   lastDebounceTime = millis();
  }
 }
}

void adjust_time(int menu_place)
{
 switch(menu_place)
 {
  case 1:
   if (digitalRead(buttonUp) == HIGH)
   {
    Hours++;
   }
   if (digitalRead(buttonDown) == HIGH)
   {
    Hours--;
   }
   break;

  case 2:
   if (digitalRead(buttonUp) == HIGH)
   {
    Min++;
   }
   if (digitalRead(buttonDown) == HIGH)
   {
    Min--;
   }
   break;
 }
}