Tween the animation of an object?

I’m trying to make it so my sky background changes every few minutes. I have all of its animations inside of the object. How do I tween to one of those animations?

Instead of tweening, what happens if you make all the animations as frames for one animation, and set the animation speed to few minutes?

Why do you want to manage with Tween ?
When ethe sky background has to change (event- timer…) ?