Moving A Part?

There are no errors? I expect the code to move the part in the direction of the mouse if you are top down on the part.

local plr = game.Players.LocalPlayer
local Ball = nil
local Screensize = script.Parent:WaitForChild("Shadder").AbsoluteSize

function glideTorwards(currentValue,targetValue,rate)
    if currentValue < targetValue then
        return math.min(targetValue,currentValue + rate)
    elseif currentValue > targetValue then
        return math.max(targetValue,currentValue - rate)
    else
        return targetValue
    end
end

function WFB()
WFBRequire()
while wait() do
local Ba = _G.PlayerBall
    if Ba ~= nil then
        return Ba
    end
end
end

function WFBRequire()
    local MouseY = nil
    local MouseX = nil
    if plr:GetMouse().Y > Screensize.Y/2 then
        MouseY = 2
    elseif plr:GetMouse().Y < Screensize.Y/2 then
        MouseY = -2
    end
    if plr:GetMouse().X > Screensize.X/2 then
        MouseX = 2
    elseif plr:GetMouse().X < Screensize.X/2 then
        MouseX = -2
    end
    repeat wait() until Ball ~= nil
    while wait() and Ball ~= nil do
        Ball.Position = Vector3.new(glideTorwards(Ball.Position,(Ball.Position + Vector3.new(MouseX,0,MouseY)),2))
    end
    WFB()
end

Ball = WFB()