send multiple values over serial from Processing to Arduino

arduino_firmware.cpp

int currentValue = 0;
int values[] = {0,0};

void setup()  {
  Serial.begin(9600);
} 


void loop() {   
  if(Serial.available()){
    int incomingValue = Serial.read();
    
    values[currentValue] = incomingValue;

    currentValue++;
    if(currentValue > 1){
      currentValue = 0;
    }
    
    // after this point values[]
    // has the most recent set of
    // all values sent in from Processing
  } 
} 

processing_sketch.pde

// import the processing serial library
import processing.serial.*;
// and declare an object for our serial port
Serial port;

void setup() {
  // Get the name of the first serial port
  // where we assume the Arduino is connected
  String portName = Serial.list()[0];
  // initialize our serial object with this port
  // and the baud rate of 9600
  port = new Serial(this, portName, 9600);
}

void draw() {      
  int value1 = 123;
  int value2 = 17;
  
  // load up all the values into a byte array
  // then send the full byte array out over serial
  // NOTE: This only works for values from 0-255  
  byte out[] = new byte[2];
  out[0] = byte(value1);
  out[1] = byte(value2);
  port.write(out);
}