I've been trying to make my own rig for a human, but I can't assign
simplefollower. I need your help, indeed.

For instance, we have 2 bones: B_1, B_2. B_1 is a parent.
I assign a script for B_2:
add_simple_follower selected, true, 1, 0, 0, parent, 1, 0, 0,
null_item, 0, 0, 0

Well, it does not assign a simplefollower(from simplerigger) to B_2.

I really don't know what to do.