Value status doesn't change?

(This is a normal script, not a LocalScript)

Okay so, I'm trying to make a script so that you can click a gas can and it changes your value, if your value is changed, you can fuel something. I put this script in StarterCharacterScripts so that it creates a value when the player joins. Code:

local Player = game.Players.LocalPlayer

local Value = Instance.new("BoolValue")

Value.Parent = Player
Value.Name = "HasGas"
Value.Value = false

But, the problem isn't with the value. I'm trying to make the value change when you click a button, here's my code:

local Player = game.Players.LocalPlayer
local value = Player:WaitForChild("HasGas")

script.Parent.ClickDetector.MouseClick:Connect(function()
value.Value = true
end)

I get an error with this; here's the error: "attempt to index nil with WaitForChild"

Did I type or do something wrong? Thanks, and if you can help, that would be greatly appreciated.

Your problem is that you are creating the value on the client (local script), and because the server can't see the stuff that the client is making, it is returning nil. To fix this, you should make the bool value on the server (in a Script).