Arduino Bluetooth Car Project Code

In this video, i have completely explained the code and working of the Arduino Bluetooth car.

The code is:

const int motorA1 = 8;
const int motorA2 = 9;

const int motorB1 = 10;
const int motorB2 = 11;

const int motorAe = 5;
const int motorBe = 6;

char speed = 100;
char change_speed_add = 30;

int command = 0;



void setup() {

  pinMode(motorA1, OUTPUT);
  pinMode(motorA2, OUTPUT);
  pinMode(motorB1, OUTPUT);
  pinMode(motorB2, OUTPUT);
  pinMode(motorAe, OUTPUT);
  pinMode(motorBe, OUTPUT);



  analogWrite (motorAe , 0);
  digitalWrite (motorA1,LOW);
  digitalWrite (motorA2,LOW);

analogWrite (motorBe , 0);
  digitalWrite (motorB1,LOW);
  digitalWrite (motorB2,LOW);

  Serial.begin(9600);



}

void loop() {

  if (Serial.available() > 0){
 
      command = Serial.read();


      if (command == 70){
     
        forward();}

        else if (command == 76){
          left();}

          else if (command == 82){
            right ();}

            else if (command == 66){
              reverse();}
              else {
              stop;}

              Serial.println (command);
  }
     
     
     
     
        }
 
  void forward(){
    Serial.println ("fwd");
 
    analogWrite(motorAe, speed);
    analogWrite(motorBe, speed);
 
    digitalWrite (motorA1, HIGH);
    digitalWrite (motorB1, HIGH);
 
    digitalWrite (motorA2, LOW);
    digitalWrite (motorB2, LOW);


 
    }




  void reverse(){
    Serial.println ("reverse");
 
    analogWrite(motorAe, speed);
    analogWrite(motorBe, speed);
 
    digitalWrite (motorA1, LOW);
    digitalWrite (motorB1, LOW);
 
    digitalWrite (motorA2, HIGH);
    digitalWrite (motorB2, HIGH);


 
    }



  void left(){
    Serial.println ("left");
 
    analogWrite(motorAe, speed +10);
    analogWrite(motorBe, speed - 10);
 
    digitalWrite (motorA1, LOW);
    digitalWrite (motorA2, HIGH);

 
    digitalWrite (motorB1, HIGH);
    digitalWrite (motorB2, LOW);


    }

    void right(){
    Serial.println ("right");
 
    analogWrite(motorAe, speed -10);
    analogWrite(motorBe, speed + 10);
 
    digitalWrite (motorA1, HIGH);
    digitalWrite (motorA2, LOW);

 
    digitalWrite (motorB1, LOW);
    digitalWrite (motorB2, HIGH);

 

 
    }
    void stop (){
      Serial.println("stop");
      analogWrite(motorAe, 0);
    analogWrite(motorAe, 0);
 
    digitalWrite (motorA1, LOW);
    digitalWrite (motorA2, LOW);

 
    digitalWrite (motorB1, LOW);
    digitalWrite (motorB2, LOW);
      }