[Closed] position weight help

hi, im scripting this bone chain:

the goal is to have a chain similar to a spline ik without spline, so I have N bones with pos.constraint to helpers (green) and oriented with look at to prev helper.
Now I need to pos.constraint green helpers to N controls (blue) but I don’t know how to do it. I’ve tried manually with help and the two controls near, it work like in the example below

but I’d want if possible constraint an help with more than 2 controls but i’m poor with math. with X bones and Y controls decided by user i dont know what weight i need for controls.

if need i also post the script