Robot Soccer

/*************** PINOS DO BLUETOOTH ***************/
#define tx  3
#define rx  4
#define gnd 5
#define vcc 6
#include<SoftwareSerial.h>
SoftwareSerial bt(rx,tx);
int comando;

/*************** PINOS DA PONTE H ****************/
#define in1 13
#define in2 12
#define in3 11
#define in4 10

void setup() {
bt.begin(9600);
Serial.begin(9600);
pinMode(vcc,OUTPUT);
pinMode(gnd,OUTPUT);
pinMode(in1,OUTPUT);
pinMode(in2,OUTPUT);
pinMode(in3,OUTPUT);
pinMode(in4,OUTPUT);

digitalWrite(vcc,HIGH);
digitalWrite(gnd,LOW);
}

void loop() {
  if(Serial.available()>0){
   comando = Serial.read(); 
  }
  if(bt.available()>0){
    comando = bt.read(); 
  }
/*************** controlando motor ***************/
      if(comando=='F'){  //FRENTE
        Serial.println("FRENTE");
        digitalWrite(in1,LOW);
        digitalWrite(in2,HIGH);
        digitalWrite(in3,HIGH);
        digitalWrite(in4,LOW);
        }
        
      if(comando=='B'){  //TRAS
        Serial.println("TRAS");
        digitalWrite(in1,HIGH);
        digitalWrite(in2,LOW);
        digitalWrite(in3,LOW);
        digitalWrite(in4,HIGH);  
        }
           
       if(comando=='R'){  //DIREITA
        Serial.println("DIREITA");          
        digitalWrite(in1,HIGH);
        digitalWrite(in2,LOW);
        digitalWrite(in3,HIGH);
        digitalWrite(in4,LOW);
        }
           
       if(comando=='L'){  //ESQUERDA
        Serial.println("ESQUERDA");
        digitalWrite(in1,LOW);
        digitalWrite(in2,HIGH);
        digitalWrite(in3,LOW);
        digitalWrite(in4,HIGH);
        
        }
           
       if(comando=='S'){  //STOP
        digitalWrite(in1,LOW);
        digitalWrite(in2,LOW);
        digitalWrite(in3,LOW);
        digitalWrite(in4,LOW);
        }
}