Why doesn't this spawn a part?

I am trying to make a part spawn when a player plays an animation, the animation plays, but that is all I get, nothing from the output either.

local animation = Instance.new("Animation")
animation.AnimationId = "http://www.roblox.com/Asset?id=178966770"

local Player = game.Players.LocalPlayer
local Mouse =  Player:GetMouse()
local animTrack = nil
local Playername = Player.Name

Mouse.KeyDown:connect(function(key)
    if key:lower() == "q" then
        local character = Player.Character
        animTrack = character:WaitForChild("Humanoid"):LoadAnimation(animation) 
        animTrack:Play()

        animTrack.KeyframeReached:connect(function(keyframeName) -- New function
            if keyframeName == 2 then -- When it gets to the second key frame do
                local Javalin = game.Lighting.Javalin:Clone()
                Javalin.Parent = game.Workspace
                Weld = Instance.new("Weld")
                Weld.Parent = game.Workspace.Playername["Right Arm"]
                Weld.Part0 = game.Workspace.Playername["Right Arm"]
                Weld.Part1 = Javalin
                for i=1, 40 do
                    Javalin.Mesh.Scale.x = Javalin.Mesh.Scale.x +0.5
                    wait(0.1)
                end
            end
        end)
    end
end)