ImageButton won't go transparent after a if statement?

what i'm trying to do is, when the client clicks the arrow a bunch of imagebutton turns transparent and different imagebuttons turns visible. and i'm checking if the Dreamy Black Hair is visible which it was when i tested it, but the arrow icon didn't turn transparent!

repeat wait() until game.Players.LocalPlayer.PlayerGui ~= nil
--//GUIs
local HairGui = game.Players.LocalPlayer.PlayerGui:WaitForChild("HairGui")
--//Main
script.Parent.MouseButton1Down:Connect(function() 
	HairGui["Beautiful Hair for Beautiful People"].Visible = false
	HairGui["Black Scene Hair"].Visible = false
	HairGui["Black Swoosh Hair"].Visible = false
	HairGui["Red and Black"].Visible = false
	HairGui.Shaggy.Visible = false
--//Next Row

	HairGui["Dreamy Black Hair"].Visible = true
	HairGui["Animazing Hair"].Visible = true
	HairGui["Roblohunk Hair"].Visible = true
end)

--// Main Issue
if HairGui["Dreamy Black Hair"].Visible == true then
	HairGui:WaitForChild("ArrowKey").Visible = false
end

repeat wait() until game.Players.LocalPlayer.PlayerGui ~= nil

should be

repeat wait() until game.Players.LocalPlayer:FindFirstChild("PlayerGui") ~= nil

if HairGui["Dreamy Black Hair"].Visible == true then
    HairGui:WaitForChild("ArrowKey").Visible = false
end

should be inside of the MouseClick event