gistfile1.txt

//Processing

  dev.write('x'); 
  dev.write(r, INT); 
  dev.write(g, INT); 
  dev.write(b, INT);

//Arduino

if (Serial.available()) {             // If data is available to read,
   val = Serial.read();                // read it and store it in val
   

   if (val == 'x') {                   //If start char is recieved,
     while (!Serial.available()) {}    //Wait until next value.
     r = Serial.read();              //Once available, assign.

     while (!Serial.available()) {}    //Same as above.
     g = Serial.read();

     while (!Serial.available()) {}
     b = Serial.read();
     }
 }