// Learning Processing
  // Daniel Shiffman
  // http://www.learningprocessing.com
  
  // Example 19-2: Simple therapy client
  
  // Import the net libraries
  import processing.net.*;
  // Declare a client
  Client client;
  
  // Used to indicate a new message
  float newMessageColor = 0;
  // A String to hold whatever the server says
  String messageFromServer = "";
  // A String to hold what the user types
  String typing ="";
  
  PFont f;
  
  void setup() {
    size(400,200);
    // Create the Client, connect to server at 127.0.0.1 (localhost), port 5204
    client = new Client(this,"127.0.0.1", 5204);
    f = createFont("Arial",16,true);
  }
  
  void draw() {
    background(255);
    
    // Display message from server
    fill(newMessageColor);
    textFont(f);
    textAlign(CENTER);
    text(messageFromServer,width/2,140);
    
    // Fade message from server to white
    newMessageColor = constrain(newMessageColor+1,0,255); 
    
    // Display Instructions
    fill(0);
    text(" Type text and hit return to send to server. ",width/2,60);
    // Display text typed by user
    fill(0);
    text(typing,width/2,80);
    
    // If there is information available to read
    // (we know there is a message from the Server when there are greater than zero bytes available.)
    if (client.available() > 0) { 
      // Read it as a String
      messageFromServer = client.readString();
      // Set brightness to 0
      newMessageColor = 0;
    }
  }
  
  // Simple user keyboard input
  void keyPressed() {  
    // If the return key is pressed, save the String and clear it
    if (key == '\n') {
      // When the user hits enter, write the sentence out to the Server
      client.write(typing); // When the user hits enter, the String typed is sent to the Server.
      typing ="";
    } else {
      typing = typing + key;
    }
  }