关于 'attempt to index nil with 'GetMouse'' 的放置代码问题，我在一个需要变量代码后没有获得任何的变量代码

我已经尝试了我的其他问题的答案，但它没有起作用。我对Lua相当新，也许我错过了什么。

local player = game.Players.LocalPlayer
local Mouse = player.GetMouse()
local Block = game.ServerStorage.Experimental

Mouse.Button1Down(place)

function place()
    Mouse.Hit.X = PosX
    Mouse.Hit.Y = PosY
    Mouse.Hit.Z = PosZ

    PlacedBlock = Block:Clone()
    PlacedBlock.Parent = game.Workspace
    PlacedBlock.Position = Vector3.new(PosX,PosY,PosZ)
end