Good day.
I would like to ask what is the name of one mod for minecraft, in which there are already positions for the player when all you have to do is press a button and he will do e.g. that the player: sits, lies on his stomach, lies on his back, arms outstretched like a zombie, etc. Is it possible to create a custom position for the player in that mode? For e.g. : lying with his arms outstretched like a corpse or to have his hands behind his back.

Just like in the pictures, the figures are on the ground in a pose or those who are standing have their arms or legs in a different pose.
I want to know if it is possible to make the actual position of the player character and also what is the name of this mod.