if i read the page well i see this :
(optional) Create an animation
To create an animated miniature open the animation menu using /miniature animation. Then, add the miniatures you want to use as "frames" in the animation; change the tick delay between the animation frames if you want to and create the animation using the "Create Animation" button. If you want to edit an existing animation, just hold the animated item in your hand and run the command as usual.
i have seen amzing things made with this havnt hade time to install it myself will let you know if its possible when i have time