Why won't my minimize text button script minimize anything?

I'm trying to make a minimize button that only minimizes the bottom parts and not the top, but my script isn't working...

local Minimized = false
script.Parent.MouseButton1Down:connect(function()
Minimized = true
script.Parent.Parent.OverLine1.Visible = false
script.Parent.Parent.UnderLine1.Visible = false
script.Parent.Parent.OverLine2.Visible = false
script.Parent.Parent.UnderLine2.Visible = false
script.Parent.Parent.Visible = false
script.Parent.Parent.MainBar.Visible = true
script.Parent.Parent.MainBarShadow.Visible = true
end)
if Minimized == true
	and
	script.Parent.MouseButton1Down:connect(function()
script.Parent.Parent.OverLine1.Visible = true
script.Parent.Parent.UnderLine1.Visible = true
script.Parent.Parent.OverLine2.Visible = true
script.Parent.Parent.UnderLine2.Visible = true
script.Parent.Parent.MainBar.Visible = true
script.Parent.Parent.MainBarShadow.Visible = true
Minimized = false

Thanks if you can help, also I'm kind of a noob so please go easy!

Not totally sure what you were going for. This should always turn the MainBar to visible and turn the other gui's to the same as minimized

local minimized = false

script.Parent.MouseButton1Down:Connect(function()
	minimized = not minimized
	script.Parent.Parent.OverLine1.Visible = minimized
	script.Parent.Parent.UnderLine1.Visible = minimized
	script.Parent.Parent.OverLine2.Visible = minimized
	script.Parent.Parent.UnderLine2.Visible = minimized
	script.Parent.Parent.Visible = minimized
	script.Parent.Parent.MainBar.Visible = true
	script.Parent.Parent.MainBarShadow.Visible = true
end)