Arduino RGB Serial Control

arduino-rgb-serial.ino

#define REDPIN 3
#define GREENPIN 5
#define BLUEPIN 6

unsigned long lastCommandDelay = 30000;
unsigned long timeLastCommand;

byte inByte = 0;
char code[4]; 
int bytesread = 0;

void setup () 
{
  Serial.begin(57600);
  pinMode(REDPIN, OUTPUT);
  pinMode(GREENPIN, OUTPUT);
  pinMode(BLUEPIN, OUTPUT);
}

void loop () 
{
  handleIncomingData();     
  if( (millis() - timeLastCommand) > lastCommandDelay)
  {
    setColor(0,0,0);
  } 
}

void handleIncomingData()
{
  if (Serial.available() > 0)
  {
    inByte = Serial.read();
    if(inByte == 4)
    {
      bytesread = 0;
      while(bytesread<4)
      {
        if( Serial.available() > 0)
        {
          inByte = Serial.read(); 
          if((inByte == 10)||(inByte == 13))
          { 
            break;                       
          } 
          code[bytesread] = inByte;  
          bytesread++;                   
        } 
      } 
      if(bytesread == 3)
      { 
        setColor(code[0],code[1],code[2]);   
        Serial.flush();   
      } 
      bytesread = 0;
      timeLastCommand = millis();
    }
  }
}

void setColor(int r, int g, int b)
{  
  analogWrite(REDPIN, r);
  analogWrite(GREENPIN, g);
  analogWrite(BLUEPIN, b);
}

So how does the code work? Do I send 255 255 255 from the Serial at 57600 baud?