The images being repeated

I use the image rotator widget to display for sponsors logos. For the time being, I only got two logos. But in future there might be more, so I make the widget wide enough to display four logos, so if later on got more than 4 logos, the logos will rotate.

However, the rotator now fill up the whole area with those two logos I uploaded (so now it got 4 logos with two repeated). Anyway to solve it? so that logos will not rotate and not repeat when the current images cannot fill up the widget area?

Thanks.

https://wordpress.org/plugins/dk-new-medias-image-rotator-widget/