NotificationSender

local re = game.ReplicatedStorage:WaitForChild("OnOwnerJoined")


local function callback(text)

    if text == "Yes!" then

        game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 50

    end
end


local bindableFunction = Instance.new("BindableFunction")
bindableFunction.OnInvoke = callback


re.OnClientEvent:Connect(function()

    game.StarterGui:SetCore("SendNotification",
        {

        Title = "Owner has joined!";
        Text = "Do you want extra walk speed?";

        Icon = "rbxassetid://156507320";

        Duration = 10;

        Callback = bindableFunction;

        Button1 = "Yes!";
        Button2 = "No!"

        }
    )

end)