Trying to position a part beneath another part. Can anyone help me?

So I'm trying to get the special mesh to be aligned under the meteorite as I am making a meteorite but I don't know how to do it.

local p = game.Players.LocalPlayer
Mouse = p:GetMouse()
local Head = p.Character.Head
Mouse.Button1Down:Connect(function()
        --------Meteorite----------------------
        local rock = Instance.new("Part",workspace)
        rock.BrickColor = BrickColor.new("Dirt brown")
        rock.Material = "Slate"
        rock.Transparency = 0
        rock.Anchored = true
        rock.CFrame = p.Character.Head.CFrame*CFrame.new(0,10,-15)
        rock.BackSurface = "Smooth"
        rock.BottomSurface = "Smooth"
        rock.FrontSurface = "Smooth"
        rock.LeftSurface = "Smooth"
        rock.RightSurface = "Smooth"
        rock.TopSurface = "Smooth"
        ---------------rockmesh--------------
        local mesh7 = Instance.new("SpecialMesh",rock)
        mesh7.MeshId = "rbxassetid://651296532"
        mesh7.Scale = Vector3.new(0.3, 0.3, 0.3)
        --------------FlameBrick--------------------------
        local flamebrick = Instance.new("Part",rock)--how can i rotate this to be under the meteorite--
        flamebrick.BrickColor = BrickColor.new("Institutional white")
        flamebrick.Material = "Neon"
        flamebrick.Transparency = 0.95
        flamebrick.Anchored = true
        flamebrick.CFrame = Head.CFrame*CFrame.new(0,12,-16)
        flamebrick.BackSurface = "Smooth"
        flamebrick.BottomSurface = "Smooth"
        flamebrick.FrontSurface = "Smooth"
        flamebrick.LeftSurface = "Smooth"
        flamebrick.RightSurface = "Smooth"
        flamebrick.TopSurface = "Smooth"
        --------------flamebrickmesh---------------------
        local mesh8 = Instance.new("SpecialMesh",flamebrick)
        mesh8.MeshId = "rbxassetid://437245586"
        mesh8.Scale = Vector3.new(0.9,0.9,0.9)
end)