Script that's supposed to make StringValue the name of the player who clicked a GUI doesn't work?

This is my script. It is part of a revolutionary new checkout system that will be put into my new store game that will be part of my store group. What it is supposed to do is this: When "Yes" is clicked on a GUI, the StringValue in the Workspace (WorkerValue) becomes the name of the player who clicked it. However, it will not do so if a BoolValue in the Workspace equals true because that would mean that there is already someone working at that register. It does not work. There are no output errors, it plain old doesn't work. Why? Here is the script:

script.Parent.MouseButton1Click:Connect(function()
	script.Parent.Parent.Visible = false
	if game.Workspace.Value == true then
			script.Parent.Parent.Visible = true
			elseif game.Workspace.Value == false then
	for _, Player in pairs(game.Players:GetPlayers()) do
		game.Workspace.Value = true
		game.Workspace.WorkerValue = Player.Name
		end
	end
end)