How do I make a custom Forcefield made of parts?

I have a forcefield that is 2 parts, and a particle brick (Basically 3 parts) and I'm assuming that I need to weld the parts, but I don't know which ones to weld, and how to weld it to a character, and to make it go away after a few seconds.

I have a script that destroys the 3 parts after 6.5 seconds (Very simple script)

wait(6.5) script.Parent:remove().

I don't know how to make it spawn on the character on reset or weld it to the character to where it stays on them if they walk around, so thats what I'm asking.