gistfile1.txt

//===============================
//    arduino
//===============================

void setup(){
  Serial.begin(9600);
  pinMode(13,INPUT);
}

void loop(){
  int val=digitalRead(13);
  Serial.println(val);
}

//===============================
//    processing
//===============================

import processing.serial.*;
Serial port;

void setup(){
  size(200,200);
  port = new Serial(this,"COM3",9600);
}
void draw(){
  delay(100);
  println(receive);
}

int receive;

void serialEvent(){
  delay(100);
  receive = port.read();
}