MMM-BackgroundSlideshow animation

[Sven1894]

Hello,
I want to display a picture which is bigger than the screen. The height of the pic is bigger than the height of the screen, so I used the backgroundAnimationEnabled Option of the MMM-BackgroundSlideshow module. Now the picture scrolls either from top to bottom, or from bottom to top. But I want that it only scrolls from top to bottom. Is there any option to set that?

Here is my config entry of the module:

{
    module: 'MMM-BackgroundSlideshow',
    position: 'fullscreen_below',
    config: {
      imagePaths: ['modules/MMM-BackgroundSlideshow/bt-background/'],
	  slideshowSpeed: 86400,
      transitionImages: true,
      randomizeImageOrder: true,
	  transitionSpeed: '0s',
	  backgroundAnimationEnabled: true,
	  backgroundPosition: 'top',
	  backgroundSize: 'cover',
	  animations: ['slide'],
	  backgroundAnimationLoopCount: '1',
	  backgroundAnimationDuration: '5s',
    },
  },

Thanks for any help