Motion picture with gdkpixbuf

["Kim Jongha" <kim jongha gmail com>]

Greeting,
I want to move a picture with gdkpixbuf when I press some key.

It's hard to explain , but when I press some key, I want some image to
move from position 1 to position 2, just like a motion picture .

-----           ------
| 2 |           |  1 |
-----           -------

Anyway I moved the image to position 2, but It's not a motion picture.
As time goes by, The image was just moved from 1 to 2

core part of my code below:

da = gtk_drawing_area_new();
while(i<50)
{
 gdk_pixbuf_copy_area(background, 0,0,back_width, back_height, frame, 0,0);
 /*of course r1.x value is decrease by 1 */
 if(gdk_rectangle_intersect(&r1, &r2, &dest);
 {
    gdk_pixbuf_composite(....)
 }

 gtk_widget_queue_draw(da);

  g_usleep(50);
}

Does somebody help me?