#define BTN_LED 6
int req;
int bblink;
int bled;
unsigned long timer;
int tb;
bool block;
bool re;


void ledbtn_mode(int sd) {
 switch (sd) {
   case 1:
    if(bblink != 1) {
      digitalWrite(BTN_LED, HIGH);
      bblink = 1;
    }
   break;
   case 5:
    if(bblink != 5) {
      block = false;
      tb = 0;
      timer = millis();
      bblink = 5;
    }
   break;

 }
}

void setup() {
  Serial.begin(115200);
  pinMode(BTN_LED, OUTPUT);
}

void loop() {
  if(Serial.available() > 0) {
    req = Serial.parseInt();
  }
  if(req == 10){
    ledbtn_mode(1);
  } else if(req == 15) {
    ledbtn_mode(5);
  }

  if(bblink == 5) {
    if(tb < 6 && (millis() - timer) >= 500) {
      if(digitalRead(BTN_LED) == HIGH) {
        bled = LOW;
      } else {
        bled = HIGH;
      }
      digitalWrite(BTN_LED, bled);
      tb++;
      timer = millis();
    } else if(tb >= 6 && block == false) {
      Serial.println("<320>");
      if(digitalRead(BTN_LED) == LOW) {
        digitalWrite(BTN_LED, HIGH);
      }
      block = true;
    }
  }
}