Automatic music player help?

Ok so I recently I tried adding a Auto Player to my game, and it worked (for the most part) but now when I tried to add it so the songs fade out at the end and in on the beginning, Nothing works anymore and there are no error outputs. ????

local x = game.Workspace.DJBoardPRO
local o = script.Parent.Parent.Parent

script.Parent.MouseButton1Click:connect(function()
	local Songs = {--200 song ID's--}
	if script.Parent.Text == "Auto Players current status: Off" then
		script.Parent.Text = "Auto Players current status: On"
		while script.Parent.Text == "Auto Players current status: On" do
			o.Header.Text = "AutoPlayer is on"
			x.Sound:Stop()
			x.Sound.Volume = 0
			x.Sound.SoundId = ""
			wait()
			x.Sound.SoundId = "http://www.roblox.com/asset/?id=" .. Songs[math.random(1, #Songs)]
			x.Sound:Play()
			
				function In() --Where I need help--
					for i = 0, 1, 0.01 do
					wait(1)
					x.Sound.Volume = i
	
			wait(100)
			
				function Out() --Where I need help (x2)--
					for i = 1, 0, -0.01 do
					wait(1)
					x.Sound.Volume = i
					
			x.Sound:Stop()
			x.Sound.SoundId = ""
						end
					end
				end
			end
		end
	else
		if script.Parent.Text == "Auto Players current status: On" then
			script.Parent.Text = "Auto Players current status: Off"
			o.Header.Text = "DJ-Board (Revised) V.15.2"
			x.Sound:Stop()
			x.Sound.SoundId = ""
			script.Disabled = true
			wait()
			script.Disabled = false
		end
	end
end)

So I think the problem is your for loops (Please correct me if I'm wrong)

for i = 1, 10  do
          wait(1)
            x.Sound.Volume = x.Sound.Volume -.1
end

This is how this script communicates. We'll repeat this 10 times, wait one second then take .1 away from the volume (Which I assume would be 1). first second : x.Sound.Volume = .9 next second : x.Sound.Volume = .8 next second : x.Sound.Volume = .7 ECT. for 10 times. So by the end of the end of the for loop, it'll be 0