How do I stop a cloned part from being positioned on top of a part?

So, when I clone a part, I want to position it inside of a part. Instead, it positions it on top of the part that's supposed to be positioned to.

Here's my script:

local tool = script.Parent.Parent
local player = game.Players.LocalPlayer
local hum = player.Character:WaitForChild("Humanoid")
local animation = game.ServerStorage.Anime
local blackthings = game.ServerStorage.Model.Part

local db = false
tool.Equipped:connect(function(a)
    for _,v in pairs(tool:GetChildren()) do
        v.Transparency = 1
    end
    a.Button1Down:connect(function()
        if not db then
            db = true

            animation.AnimationId = "http://www.roblox.com/asset/?id=1575109264"
            local animTrack = hum:LoadAnimation(animation)
            animTrack:Play()
            for _,v in pairs(tool:GetChildren()) do
                v.Transparency = 0
                a = 0
                repeat
                local blackthingsClone = blackthings:Clone()
                blackthingsClone.Parent = v
                blackthingsClone.CFrame = CFrame.new(v.CFrame)
                a = a + 1
                print(a)
                until a == 10
                wait()
            end
            wait(5)
            db = false
        end
    end)
end)