Why Does The Frame Appears Then Disappears? (VIDEO)

So, I'm almost finished with the frame switching it's just when I played, the main frame disappeared and I saw the Character Customize Frame, but in around milliseconds, it disappears. What code is making it do it? Here are all of the code that has to do with the Character Frame & the Main Menu frame.

local PlayButton = script.Parent-- This is when the "New Game" button disappears code.
PlayButton.MouseButton1Click:Connect(function()
wait(0.1)--Duration before it goes away
script.Parent.Parent.Visible = false
end)

local Button = script.Parent-- This makes the main menu frame disappear
Frame = script.Parent

function onClick()
    if Frame.Visible == false then
    Frame.Visible = true
    elseif Frame.Visible == true then
        Frame.Visible = false
    end
end

Button.MouseButton1Click:Connect(onClick)

local Button = script.Parent-- This is the code for trying to make the Character Frame appear
Frame2 = script.Parent.Parent.CharacterFrame-- After the button was clicked.

function onClick()
    if Frame2.Visible == false then
    Frame2.Visible = true
    elseif Frame2.Visible == true then
        Frame2.Visible = false
    end
end

Button.MouseButton1Click:Connect(onClick)

So, what are the problems inside of the code that has to do with the Character Frame disappearing in a really short period of time?

(copy this link and paste then press enter) www.youtube.com/watch?v=AGJT5h-1S8o