Hi, wondering how to make it so that it only detects a hit once?

When a player touches the part this script is assigned to, the shop GUI flashes on the screen because the parts that hit the part all have Humanoid in their parent. How do I make it so that it only does it once, and when the player leaves the shop circle, the GUI closes?

Shop = game.Workspace.ShopModel:FindFirstChild("Shop")

Players = game:GetService("Players") player = Players.LocalPlayer

Shop.Touch.Touched:Connect(function(hit) hit = hit.Parent:FindFirstChild("Humanoid") if hit ~= nil then local ShopGUI = player:FindFirstChild("ShopGUI",true) ShopGUI.Enabled = true
end end)

Shop.Touch.TouchEnded:Connect(function(hit) hit = hit.Parent:FindFirstChild("Humanoid") if hit ~= nil then local ShopGUI = player:FindFirstChild("ShopGUI", true) ShopGUI.Enabled = false end end)