How to make animated objects using canvas?

Question

Canvas

I want to learn how to make such animated objects as here - https://optimalog.ru/uslugi/
It is also desirable that they react to mouse movement.
Please tell me the steps:
1. How is the picture itself created? Some 3D editors?
2. How is it then translated into .vtk format?
3. How is it animated? pure js? Or is the picture itself already animated?
4. Are there any libraries or ready-made solutions for this?
Or throw the material as something similar simple to start doing yourself.
Thank you.