XNA, move the elves.

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingMicrosoft.Xna.Framework;usingMicrosoft.Xna.Framework.Audio;usingMicrosoft.Xna.Framework.Content;usingMicrosoft.Xna.Framework.GamerServices;usingMicrosoft.Xna.Framework.Graphics;usingMicrosoft.Xna.Framework.Input;usingMicrosoft.Xna.Framework.Media;namespacewindowsgame1{/// <summary>    ///This is the main type for your game/// </summary>     Public classGame1:Microsoft.Xna.Framework.Game {Graphicsdevicemanager graphics;        SpriteBatch SpriteBatch;        Texture2d texture;        Texture2d texturetransparent; Vector2 POS1=Vector2.zero; Vector2 Pos2=Vector2.zero; floatSpeed1 =2f; floatSpeed2 =3f;  PublicGame1 () {graphics=NewGraphicsdevicemanager ( This); Content.rootdirectory="Content"; }        /// <summary>        ///allows the game to perform any initialization it needs to before starting to run. ///This is the where it can query for any required services and load any non-graphic///related content. Calling base. Initialize'll enumerate through any///and initialize them as well. /// </summary>        protected Override voidInitialize () {//Todo:add Your initialization logic here            Base.        Initialize (); }        /// <summary>        ///loadcontent'll be called once per game and was the place to load///All of your content. /// </summary>        protected Override voidloadcontent () {//Create A new spritebatch, which can be used to draw textures.SpriteBatch =NewSpriteBatch (GraphicsDevice); //@ means ignore escape charactersTexture = content.load<texture2d> (@"Images/logo"); Texturetransparent= Content.load<texture2d> (@"Images/logo_trans"); //Todo:use this. Content to load your game content here        }        /// <summary>        ///unloadcontent'll be called once per game and was the place to unload///All content. /// </summary>        protected Override voidunloadcontent () {//todo:unload any non contentmanager content here        }        /// <summary>        ///allows the game to run logic such as updating,///checking for collisions, gathering input, and playing audio. /// </summary>        /// <param name= "GameTime" >provides a snapshot of timing values.</param>        protected Override voidUpdate (GameTime GameTime) {//allows the game to exit            if(Gamepad.getstate (Playerindex.one). Buttons.back = =buttonstate.pressed) This.            Exit (); //Todo:add Your update logic herePos1. X + =speed1; if(POS1. x>window.clientbounds.width-texture.width| |pos1. X<0) speed1*=-1; Pos2. Y+=Speed2; if(Pos2. Y > Window.clientbounds.height-texturetransparent.height | |Pos2. Y<0) Speed2*= -1; Base.        Update (GameTime); }        /// <summary>        ///This was called when the game should draw itself. /// </summary>        /// <param name= "GameTime" >provides a snapshot of timing values.</param>        protected Override voidDraw (GameTime GameTime) {graphicsdevice.clear (color.cornflowerblue); //Todo:add your drawing code here//notifies the video card to start transferring files//start drawing from the top left corner//White says no staining .Spritebatch.begin (); //Spritebatch.draw (texture, Vector2.zero, color.white);Spritebatch.draw (texture, POS1,NULL, Color.White,0, Vector2.zero,1, Spriteeffects.none,0); Spritebatch.draw (Texturetransparent, Pos2,NULL, Color.White,0, Vector2.zero,1, Spriteeffects.none,1);                        Spritebatch.end (); Base.        Draw (GameTime); }    }}

XNA, move the elves.