Insane lag while opening GUI?

Heres the code :

local frame = script.Parent.Parent.Parent.Parent.SettingsFrame
script.Parent.Activated:Connect(function()
    if frame.Visible == false then
        frame.Visible = true
        script.Parent.TextColor3 = Color3.fromRGB(0,0,0)
        script.Parent.Parent.BackgroundColor3 = Color3.fromRGB(255,255,255)
        local tweeninfo = TweenInfo.new(.5,Enum.EasingStyle.Sine,Enum.EasingDirection.Out)
        local tween = game.TweenService:Create(frame,tweeninfo,{Size = UDim2.new(0.197, 0,0.575, 0)})
        tween:Play()
    else 
        script.Parent.TextColor3 = Color3.fromRGB(255,255,255)
        script.Parent.Parent.BackgroundColor3 = Color3.fromRGB(0,0,0)
        local tweeninfo = TweenInfo.new(.5,Enum.EasingStyle.Sine,Enum.EasingDirection.Out)
        local tween = game.TweenService:Create(frame,tweeninfo,{Size = UDim2.new(0,0,0,0)})
        tween:Play()
        tween.Completed:Connect(function()frame.Visible =false end)
    end
end)

When I open the GUI it causes immense lag and spikes my Send packets which lags my wi-fi. The GUI is a basic settings UI. I have a high end laptop too.