Atmega 8 based device controller using arduino

/*
////////////////////////////////////
//////////Magnatron/////////////////
////////////////////////////////////
////magnatronelectronics@gmail.com//
////////////////////////////////////
////////////////////////////////////
*/
int val = 0;       // variable to store the data from the serial port
int rlyPin1 = 13;
int rlyPin2 = 12;
int rlyPin3 = 11;
int rlyPin4 = 10;
void setup()
{
  pinMode(rlyPin1,OUTPUT); //Declare relayPINs
  pinMode(rlyPin2,OUTPUT); //Declare relayPINs
  pinMode(rlyPin3,OUTPUT); //Declare relayPINs
  pinMode(rlyPin4,OUTPUT); //Declare relayPINs
  Serial.begin(9600); 
  Serial.print("Magnatron Technologies");
  delay(1000);
  Serial.print("Device Status : Initializing");
  for (int i=0; i <= 4; i++)
  {
    Serial.print('.');
    delay(10);     
  }
  Serial.print("System check: OK");
  delay(500);
}

void loop ()
{


  val = Serial.read();

  if (val != -1)
  {
    switch ( val)
    {  
    case 10 :   
      Serial.print("device 1 Status : OFF");
      rlyPin1=LOW;
      break;

    case 11:   
      Serial.print("device 1 Status : ON");
      rlyPin1=HIGH;
      break;

    case 20:   
      Serial.print("device 2 Status : ON");
      rlyPin2=LOW;
      break; 
    case 21:   
      Serial.print("device 2 Status : ON");
      rlyPin2=HIGH;
      break;

    case 30:   
      Serial.print("device 3 Status : ON");
      rlyPin3=LOW;
      break; 
    case 31:   
      Serial.print("device 3 Status : ON");
      rlyPin3=HIGH;
      break;

    case 40:   
      Serial.print("device 4 Status : ON");
      rlyPin4=LOW;
      break; 
    case 41:   
      Serial.print("device 4 Status : ON");
      rlyPin4=HIGH;
      break;  

    case 00:
      {
        Serial.print("device * Status : OFF");
        rlyPin1=LOW;
        rlyPin2=LOW;
        rlyPin3=LOW;
        rlyPin4=LOW;

      }
    case 44:
      {
        Serial.print("device * Status : ON");
        rlyPin1=HIGH;
        rlyPin2=HIGH;
        rlyPin3=HIGH;
        rlyPin4=HIGH;   
      }
    default:
      Serial.print("Error: Unrecognized character");

    }
  }
}