put line art and colour art in different layers

Node library>auto-patch> place it by the “upper arm”> connect the auto patch from top to the “upper arm”> connect the auto patch from bottom to above the “lower arm” (Keep the auto patch above the layer that you need to patch )

peg

In the node view> select all drawings> shift+command+p> peg created

select the rotation point drawing>hit the solo key> select the peg> rotation point tool> drag the pivot point to the central of the rotation point

open the properties (yellow box) of “hand peg” and “wrist peg”> copy&paste the x and y axis values from”wrist peg”to”hand peg”

to connect the shoulder and the upper arm: (do the same to the lower arm&elbow, hand&wrist)

select both pegs> command+p> to create a peg> connect the peg to both shoulder and upper arm pegs

Add a master peg:

connect the master to shoulder&upper arm peg> connect the master to the elbow&lower arm peg> connect the elbow&lower arm peg to the wrist&hand peg

animate on the master peg with keyframes

(select peg, hit R to reset)