import processing.serial.*;
Serial myPort;  // Create object from Serial class
int tmp,inByte;

void setup() 
{
  size(640,480); //make our canvas 200 x 200 pixels big
  String portName = Serial.list()[1]; //change the 0 to a 1 or 2 etc. to match your port
  myPort = new Serial(this, portName, 9600);
}

void draw() {
  while (myPort.available() > 0) {
    inByte = myPort.read();
    }   
    translate(320,240);
    background(0,255,24);
    float rotx=float(inByte)*2*PI/255;
    println(rotx);
    rotate(-rotx);
    quad(-100,-100,-100,100,100,100,100,-100);
  }