Renewing the Nikko Turbo 2 RC Car

//including the libraries
#include <SoftwareSerial.h> // TX RX software library for bluetooth

//Defining pins for RGB led
#define GREEN 12
#define RED 11
#define delayTime 3

//Initializing pins for bluetooth Module
int bluetoothTx = 8; // bluetooth tx to 2 pin
int bluetoothRx = 7; // bluetooth rx to 3 pin
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
//Front Motor Pins  
int Enable1 = 3;
int Motor1_Pin1 = 2;  
int Motor1_Pin2 = 4;  
//Back Motor Pins      
int Motor2_Pin1 = 5; 
int Motor2_Pin2 = 9;
int Enable2 = 10;
//Front Light pins   
int front_light1 = GREEN;
//Back light pins
int back_light1 = RED;
int horn = 6;
char command ; //variable to store the data
int velocity = 0; //Variable to control the speed of motor
void setup() 
{       
  //Set the baud rate of serial communication and bluetooth module at same rate.
  Serial.begin(9600);  
  bluetooth.begin(9600);
  //Setting the L298N, LED and RGB LED pins as output pins.
  pinMode(Motor1_Pin1, OUTPUT);  
  pinMode(Motor1_Pin2, OUTPUT);
  pinMode(Enable1, OUTPUT);
  pinMode(Motor2_Pin1, OUTPUT);  
  pinMode(Motor2_Pin2, OUTPUT);
  pinMode(Enable2, OUTPUT); 
  pinMode(front_light1, OUTPUT);  
  pinMode(back_light1, OUTPUT);
  pinMode(horn, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(RED, OUTPUT);
  //Setting the enable and LED pins as HIGH.
  digitalWrite(GREEN, HIGH);
  digitalWrite(RED, HIGH);
  digitalWrite(Enable2, HIGH);
  digitalWrite(back_light1, LOW);
  digitalWrite(front_light1, LOW);
}
void loop(){
  if(bluetooth.available() > 0){  //Checking if there is some data available or not
    command = bluetooth.read();   //Storing the data in the 'command' variable
    Serial.println(command);      //Printing it on the serial monitor
    
    //Change pin mode only if new command is different from previous.   
    switch(command){
    case 'F':  //Moving the Car Forward
      digitalWrite(Motor1_Pin1, LOW);
      digitalWrite(Motor1_Pin2, HIGH);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, LOW);
      break;
    case 'L':  //Moving the Car Forward Left90
      digitalWrite(Motor1_Pin1, LOW);
      digitalWrite(Motor1_Pin2, HIGH);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, HIGH);
      delay (30);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, LOW);
      break;
    case 'G':  //Moving the Car Forward Left45
      digitalWrite(Motor1_Pin1, LOW);
      digitalWrite(Motor1_Pin2, HIGH);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, HIGH);
      delay (30);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, LOW);
      break; 
    case 'R':   //Moving the Car Forward Right90
      digitalWrite(Motor1_Pin1, LOW);
      digitalWrite(Motor1_Pin2, HIGH);  
      digitalWrite(Motor2_Pin1, HIGH);
      digitalWrite(Motor2_Pin2, LOW);
      delay (30);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, LOW);
      break;
    case 'I':  //Moving the Car Forward Right45
      digitalWrite(Motor1_Pin1, LOW);
      digitalWrite(Motor1_Pin2, HIGH);
      digitalWrite(Motor2_Pin1, HIGH);
      digitalWrite(Motor2_Pin2, LOW);
      delay (30);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, LOW);
      break; 
    case 'S':   //Stop
      digitalWrite(Motor1_Pin2, LOW);
      digitalWrite(Motor1_Pin1, LOW);
      digitalWrite(Motor2_Pin2, LOW);
      digitalWrite(Motor2_Pin1, LOW);
      break; 
    case 'B':  //Moving the Car Backward
      digitalWrite(Motor1_Pin1, HIGH);
      digitalWrite(Motor1_Pin2, LOW);
      break;
    case 'J':  //Moving the Car backward Right90
      digitalWrite(Motor1_Pin2, LOW);
      digitalWrite(Motor1_Pin1, HIGH);
      digitalWrite(Motor2_Pin1, HIGH);
      digitalWrite(Motor2_Pin2, LOW);
      delay (30);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, LOW);
      break;        
   case 'H':  //Moving the Car backward Left90
      digitalWrite(Motor1_Pin1, HIGH);
      digitalWrite(Motor1_Pin2, LOW);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, HIGH);
      delay (30);
      digitalWrite(Motor2_Pin1, LOW);
      digitalWrite(Motor2_Pin2, LOW);
      break;
    case 'W':  //Front light ON 
      digitalWrite(front_light1, HIGH);
      break;
    case 'w':  //Front light OFF
      digitalWrite(front_light1, LOW);
      break;
    case 'U':  //Back light ON 
      digitalWrite(back_light1, HIGH);
      break;
    case 'u':  //Back light OFF 
      digitalWrite(back_light1, LOW);
      break; 
    case 'V':  //Horn On
{
  int i = 200; // The starting pitch
  while(i < 800) {
    i++;
    tone(horn, i); // Emit the noise
    delay(5);
  }
  delay(100); // A short break in between each whoop
}
      break; 
    case 'v':  //Horn OFF 
       noTone(horn);
      break;   
    case 'x': //Turn ON Everything
    break;
    case 'X': //Turn OFF Everything
      break;
  
    //Controlling the Speed of Car  
default:  //Get velocity
      if(command=='q'){
        velocity = 255;  //Full velocity
        analogWrite(Enable1, velocity);
      }
      else{ 
        //Chars '0' - '9' have an integer equivalence of 48 - 57, accordingly.
        if((command >= 48) && (command <= 57)){ 
          //Subtracting 48 changes the range from 48-57 to 0-9.
          //Multiplying by 25 changes the range from 0-9 to 0-225.
          velocity = (command - 48)*25;       
          analogWrite(Enable1, velocity);
        }
      }
      }
  }
}