How To Make Welded Item Have Float Animation?

Hello. I was wondering how I would be able to make a part have a "float" animation while being welded to a character. Here is how the summon looks like: https://gyazo.com/46dbb636e65fe6bf157f7dc6237e841e

I currently have this set up as a remote function, with a local and server script.

Here is the server script:

local summonevent = game.ReplicatedStorage:WaitForChild("SummonGrimoire")
wait(1)
local book = game.ReplicatedStorage.books.Grimoire1

summonevent.OnServerEvent:Connect(function(player, value)
    if value == true then
        book:Clone()
        local Character = player.Character
        local root = Character:WaitForChild("HumanoidRootPart")
        local weld = Instance.new("Weld",root)
        weld.Part0 = root
        weld.C0 = CFrame.new(1.8,0,-3) * CFrame.Angles(math.rad(30),math.rad(0),math.rad(0))
        book.Parent = root
        weld.Part1 = book
        local animation = Character.Humanoid:LoadAnimation(script.Idle)
        animation:Play()
        print("True Input sent")

    elseif value == false then
        book.Parent = game.ServerStorage
        print("False input sent")
        end
    end)

Here is the local script:

local summonevent = game.ReplicatedStorage:WaitForChild("SummonGrimoire")
local UIS = game:GetService("UserInputService")
local summoned = false

UIS.InputBegan:Connect(function(input)
    if input.KeyCode == Enum.KeyCode.Q then
        if summoned == false then
            summonevent:FireServer(true)
            summoned = true

        elseif summoned == true then 
            summonevent:FireServer(false)
            summoned = false
        end



        end 
    end
)