How can I make a part respawn?

Not going to go through the bulk explanations, explain it when we travel through the codes!

--The part should be anchored, unanchor it when needed
local TargetPart = <Your part here>--We are going to have the part.
local ParentWhere = nil--Set it
if ParentWhere == nil then  ParentWhere = TargetPart.Parent;    end
local WaitTime = 4--Seconds after the part vanishes.
local ClonedExample = TargetPart:Clone()--We clone it for the reference, storage it in the memory.
--[[Below are the statements about when should the part respawn!
In my situation, I respawn it after it vanished as null.
]]--
while true do--I repeat it forever
    repeat wait(0.01) until TargetPart == nil
    TargetPart = ClonedExample:Clone()--The cloned respawn part.
    TargetPart.Parent = ParentWhere
end

Now, we make it as a method.

--The part should be anchored, unanchor it when needed
local TargetPart = <Your part here>--We are going to have the part.
local ParentWhere = nil--Set it
if ParentWhere == nil then  ParentWhere = TargetPart.Parent;    end
local WaitTime = 4--Seconds after the part vanishes.
local ClonedExample = TargetPart:Clone()--We clone it for the reference, storage it in the memory.
--METHOD
local function RespawnIt()
    TargetPart = ClonedExample:Clone()--The cloned respawn part.
    TargetPart.Parent = ParentWhere
end
--END METHOD
--[[Below are the statements about when should the part respawn!
In my situation, I respawn it after it vanished as null.
]]--
while true do--I repeat it forever
    repeat wait(0.01) until TargetPart == nil
    RespawnIt()
end