I have a logo that appears in every slide in the left hand corner. I would like to make it a bit more dynamic by have it endlessly and slowly spin around its own ax. I found the animation to have it spin but when I set the duration until the end of the slide, every time it has spinned a 360 turn, the image stalls for a fraction of a second and then continues to spin. How can I have it spin smoothly without any visible interruptions?

Thanks!