for i,v in pairs (game:GetService("Workspace").Live:GetChildren()) do if
   v:IsA("Model") then
       v.ChildAdded:Connect(function()


game:GetService("Players").LocalPlayer.Backpack.ServerTraits.Input:FireServer("f")
       end)
           v.ChildRemoved:Connect(function()

game:GetService("Players").LocalPlayer.Backpack.ServerTraits.Input:FireServer("foff")
end)

   end
end