// Learning Processing
  // Daniel Shiffman
  // http://www.learningprocessing.com
  
  // Example 18-7: Loading a URL with simpleML
  
  import simpleML.*;
  
  // A Request object, from the library
  HTMLRequest htmlRequest;
  Timer timer = new Timer(5000);
  
  String html = ""; // String to hold data from request
  int counter = 0;  // Counter to animate rectangle across window
  int back = 255;   // Background brightness
  
  void setup() {
    size(200,200);
    
    // Create and make an asynchronous request
    htmlRequest = new HTMLRequest(this, "http://www.yahoo.com" ); 
    htmlRequest.makeRequest();
    timer.start();
    background(0);
  }
  
  void draw() {
    background(back);
    
    // A request is made every 5s. The data is not received here, however, this is only the request.  
    if (timer.isFinished()) { 
      htmlRequest.makeRequest();
      println( "Making request! " );
      timer.start();
    }
    
    // Draw some lines with colors based on characters from data retrieved
    for (int i = 0; i < width; i ++ ) {
      if (i < html.length()) {
        int c = html.charAt(i);
        stroke(c,150);
        line(i,0,i,height);
      }
    }
    
    // Animate rectangle and dim rectangle
    fill(255);
    noStroke();
    rect(counter,0,10,height);
    counter = (counter + 1) % width;
    back = constrain(back - 1,0,255);
  }
  
  // When a request is finished
  // The data is received in the netEvent() function which is automatically called whenever data is ready.
  void netEvent(HTMLRequest ml) { 
    html = ml.readRawSource();        // Read the raw data
    back = 255;                       // Reset background
    println( "Request completed! " ); // Print message
  }