Can somebody help me with this animation?

local enabled = true
mouse = Player:GetMouse()
function onKeyDown(key)
if not enabled then return end
enabled = false
    Key = key:lower()
    if key == "x" then

local animation = Instance.new("Animation")
    animation.AnimationId = "http://www.roblox.com/Asset?ID=220836646"

        local player = game.Players.LocalPlayer.Character


            local animTrack = player.humanoid:LoadAnimation(animation)
            animTrack:Play()


        wait(2)
    enabled = true
end

            mouse.KeyDown:connect(onKeyDown)

I''ve been told that I havent defined the player correctly, how do I do this?