Physics magnet with electric effect. How to do it?

Hi.

I have a sprite that acts like a magnet when is created for a few seconds.

He has LOS behavior and attracts all the physics boxes in its range.

I want to know how can I create a sprite (that looks like an electric arc) for each box that is in the magnet range and:

- is rotating and adjusting its length from the magnet to the box

- is destroyed with the magnet

I want to create the impression that electricity is pulling the box/boxes to the magnet.

This is my attempt

dropbox.com/s/d0paxhhojb0bjiz/ElectricArcForEachBoxInRange.c3p

I knew I was doing something wrong by that but I couldn't find the correct logic and conditions/actions for this :).

It works as I wanted to, thanks a lot!