Smartphone-Controlled Helmet with LED Turn Indicators

int value = 1;

void setup() {
  
  pinMode(3, OUTPUT);
  pinMode(11, OUTPUT);
  Serial.begin(9600);
}


void loop() {


  // Apk sends 0 if right button is pressed, 2 if left and 1 if stop
  if(Serial.available()){
    value = Serial.read();
  }
    
    if(value == 0){
       digitalWrite(11, HIGH);   
       delay(700);              
       digitalWrite(11, LOW);   
       delay(700); 
    }
    if(value == 2){
       digitalWrite(3, HIGH);   
       delay(700);              
       digitalWrite(3, LOW);    
       delay(700); 
    }
    if(value == 1){
      digitalWrite(3, LOW);
      digitalWrite(11, LOW);   
    }
  }