Why doesn't this script work?

Okay, this is a big job for you guys. But it keeps saying every value is nil. Why????

local copy
local torso
local your_torso
local pos
local able = true
local You
You = Workspace:FindFirstChild("FMScript")
You.Archivable = true
cloning = coroutine.create(function()
    copy = You:Clone()
    copy.Parent = workspace
    torso = copy["Torso"]
    torso.CFrame = torso.CFrame * CFrame.new(0,8,0)
    copy:makeJoints()
    your_torso = workspace["FMScript"].Torso
    for i,v in pairs(copy:GetChildren()) do
        if v:IsA("Part") then
            v.Color = BrickColor.new("Black").Color
        end
    end
end)
follow = coroutine.create(function()
    while able == true do
        wait()
        torso.CFrame = your_torso.CFrame * CFrame.new(0,0,8)
        pos = torso.CFrame:lerp(your_torso.CFrame,.2)
        torso.CFrame = pos
    end
end)
coroutine.
You:GetPlayerFromCharacter("FMScript").Chatted:connect(function(msg,rec)
    if msg == "come from the depths of hell" or "come from hell" then
        copy.Parent = workspace
    end
    if msg == "begone" then
        copy.Parent = game.Lighting
    end
    if string.sub(msg,1,7) == "attack " then
        local player = game.Players:FindFirstChild(string.sub(msg,8))
        if player then
            if player.Character then
                if copy.Parent == workspace then
                    able = false
                    torso.CFrame = player.Character["Torso"].CFrame
                    player.Character:BreakJoints()
                    able = true
                else
                    return
                end
            end
        end
    end
end)

30: attempt to index field 'game'/'You' a nil value