[AndEngine] 6. scroll image.

onCreateResources() {

    this.mAutoParallaxBackgroundTexture = new BitmapTextureAtlas(

            this.getTextureManager(), 800, 480);

...

}

onCreateScene() {

    ....

    final AutoParallaxBackground autoParallaxBackground = 

            new AutoParallaxBackround(0, 0, 0, 5);

    final VertexBufferObjectManager vertexBufferObjectManager = 

            this.getVertexBufferObjectManager();

    final ParallaxEntity bEntity = new ParallaxEntity(+2.0f,

            new Sprite(0, CAMERA_HEIGHT - this.mParallaxLayerBack.getHeight(),

            this.mParallaxLayerBack, vertexBufferObjectManager));

    autoParallaxBackground.attachParallaxEntity(bEntity);

    scene.setBackground(autoParallaxBackground);

    return scene;

}