[1.14.4] Begin with animated block

[dyno]

I would like to make an animated block (like chest when opened, the book on the enchanthing table, piston move).

I have tried to do something, yet. With BlockBench I made a mill(my last topic on the forum), but it is rendered trasparent. I tried to take a look at chest, E table... 

Can someone tell me where to begin?

Or a GitHub link

[Beethoven92]

TileEntityRenderer? https://mcforge.readthedocs.io/en/latest/tileentities/tesr/

[dyno]

2 hours ago, Beethoven92 said:

TileEntityRenderer? https://mcforge.readthedocs.io/en/latest/tileentities/tesr/

Yeah, that! 

But when I place the block, It Is rendered trasparent.

See my last topic, there is everything I made