onepart = "0,0,5"
twopart = "5,0,0"
k = Instance.new("Part",game.Workspace.JohnJohniamm55.Torso)
k.CFrame = game.Workspace.JohnJohniamm55.Torso.CFrame * CFrame.new(5,0,0)
k.Anchored = true
wait(1)
k.Vector3 = twopart:Lerp(onepart, 1)
the error is
Workspace.Script:1: attempt to call method 'lerp' (a nil value)

4 comments
I tested in SB
Error is: Workspace.Script:1: attempt to call method 'lerp' (a nil value)
Edited to fix formatting.
There's a lot wrong here.