Raycasting issue

Okay so I’ll try to explain this in short, but basically what I want to do is grab a raycastresult from the current frame, wait a frame, and then raycast backwards so I can see if the raycast hit anything inbetween the frame if that makes sense? I’ve tried to do this before but I don’t know where to shoot the ray 1 or how to handle them.

I hope you get some info out of it.
Also a tutorial for you:

In fact you should give a lot more info on your topic.