The ball object won't show up. How do i fix this?

local Player = game.Players.LocalPlayer
local Character = Player.Character or Player.CharacterAdded:Wait()
wait(1)
local Humanoid = Character.Humanoid or Character:WaitForChild("Humanoid")
local mouse = Player:GetMouse()
local ok = 0



function charge()
    if ok == 0 then
        ok = 40
        local anim = Instance.new("Animation")
        anim.AnimationId = "rbxassetid://4364880762"
        local animationtrack = Humanoid:LoadAnimation(anim)
        animationtrack:Play()
        wait(0.2)
        local ball = Instance.new("Part")
        ball.Shape = "Ball"
        ball.CFrame = Humanoid.RightArm.CFrame * CFrame.new(0,-0.9,0)
        ball.Size = Vector3.new(1, 1, 1)
        ball.Parent = game.Workspace
        ball.Material = "Neon"
        ball.BrickColor = BrickColor.new("Blue")
        ball.Transparency = 0
        ok = 3
    end
end

local UIS = game:GetService('UserInputService')

    UIS.InputBegan:connect(function(key,istyping)
      if key.KeyCode == Enum.KeyCode.Q then
            charge()
        end
    end)