RGB LED Light with HC 05 Bluetooth Module and Arduino

/*
  This program reads the the data received
  by the HC-05 Bluetooth Module from the Android
  app and writes the specific values to the RGB
  LED. This creates different colors on the LED.
 
  This program is made by Shreyas for
  Electronics Champ YouTube Channel.
  Please subscribe to this channel
  Thank You
*/
 
//Including the library
#include <SoftwareSerial.h>
 
//Creating a SoftwareSerial object
SoftwareSerial HC05(3, 4);
 
//Initialize the variables
String data = "";
int red;
int green;
int blue;
 
void setup() {
 
  //Start Serial Communication
  Serial.begin(9600);
  HC05.begin(9600);
 
  //Assign modes to the specific pins
  pinMode(A0, OUTPUT);
  pinMode(A1, OUTPUT);
  pinMode(A2, OUTPUT);
 
}
 
void loop() {
 
  //If HC-05 has received data...
  if (HC05.available()){
 
    //Reads the data
    data = HC05.readString();
 
    //Gets the value of each color
    red = data.substring(0, 3).toInt();
    green = data.substring(3, 6).toInt();
    blue = data.substring(6, 9).toInt();
 
    //Writes the values to the specific pins
    analogWrite(A0, red);
    analogWrite(A1, green);
    analogWrite(A2, blue);
    
  }
 
}