How to make spider legs animation on custom mob?

I need to know how to make the animation for the 8 legs of the spider.

To clarify some things right away, I already checked the pivot points of the legs they are all settled.

Trying to make the normal "Left leg swing animation/Right leg swing animation" Doesn't work just rotates them in their place.

Trying the "Left leg swing (Y axis)" however, just places them all in 1 place and it doesn't even look close to what a spider walking animation looks like.

How should I settle the pivot points in blockbench or the animations in the legs for them to look like a normal spider would?