1. Playerobject Player;
2. PImage[] images = new PImage[10];
3. PGraphics Background;
4. void setup() {
5.   size(640,480);
6.   Player = new Playerobject();
7.   images[0] = loadImage("spr_player.png");
8.   images[1] = loadImage("bck_stars.png");
9.   Createbackground();
10. }
11.      
12. void draw() {
13.   background(Background);
14.   imageMode(CENTER);
15.   Player.display();
16.   Player.update();
17. }
18. class Playerobject {
19.   int xpos = 200;
20.   int ypos = 200;
21.   
22.   void display() {
23.     image(images[0],xpos,ypos);
24.   }
25.   void update() {
26.     xpos = round(mouseX);
27.     ypos = round(mouseY);
28.   }
29. }
30. void Createbackground() {
31.   Background = createGraphics(640,480);
32.   Background.beginDraw();
33.   image(images[1],0,0);
34.   image(images[1],640,480);
35.   image(images[1],640,0);
36.   image(images[1],0,480);
37.   image(images[1],640,960);
38.   image(images[1],0,960);  
39.   Background.endDraw();
40. }

Thanks in advance.