#include <SoftwareSerial.h>
int val = 0;

int redLEDPin = 9;
int greenLEDPin = 10;
int blueLEDPin = 11;

void setup() {
  pinMode(redLEDPin, OUTPUT);
  pinMode(greenLEDPin, OUTPUT);
  pinMode(blueLEDPin, OUTPUT);
  Serial1.begin(9600);    //This is for bluetooth.
  Serial.begin(9600);      //This is for serial monitor.
}

void loop() {
  if ( Serial1.available() ) {
    val = Serial1.read();
    Serial.println(val);
  }
  switch ( val ) {
    case '0':
      analogWrite(redLEDPin, ???);
      analogWrite(greenLEDPin, ???);
      analogWrite(blueLEDPin, ???);
      break;
    case '1':
      analogWrite(redLEDPin, ???);
      analogWrite(greenLEDPin, ???);
      analogWrite(blueLEDPin, ???);
      break;
    case '2':
      analogWrite(redLEDPin, ???);
      analogWrite(greenLEDPin, ???);
      analogWrite(blueLEDPin, ???);
      break;
  }
}