I am making a Holo Training Place and I need some help,anyone please correct me?

So I want to make a training place and so far I have this:

game.Players.ChildAdded:connect(function(player)
player.Chatted:connect(function(chat)
if player:GetRankInGroup(config.GroupId.Value) >= config.RankId.Value then
	if string.lower(chat) == "sf" then
if not game.Workspace:FindFirstChild("Thing") then
game.Lighting.Thing:Clone().Parent = game.Workspace
end
elseif string.lower(chat) == "close sf" then
if game.Workspace:FindFirstChild("Thing") then
game.Workspace.Thing:Remove()
end
end
end
end)
end)