gui not becoming visible with localscript?

trying to make it so a gui becomes visible when you click on grass when you click on the grass it activates a gui in the player's model in workspace called "spiderchosen" the value is a boolvalue and the value does get set to true however the script does not work https://imgur.com/Iu3uYIZ https://imgur.com/iJNMIbm

local player = game.Players.LocalPlayer
local character = player.Character
wait(1)
local spiderchosen = character.spiderchosen.Value
while wait(.5) do
	if spiderchosen == true then
		script.Parent.Visible = true
		wait(5)
		script.Parent.Visible = false
	end
end