How come my script doesn't work a second time, and how come it doesn't move back 0.2 and back?

I made a script where I click the button and it supposed to move back 0.2 of the z axis which mean the music should be on, and if I click it again it is supposed to come back to normal as in come back adding 0.2 and then the music stops. It also determines to turn on if the decal is in the id I put in. Well, the problem is that I tested it and it worked on the first time, but it didn't move back or anything, and it also didn't start the sound after the second time. This is the script:

button = game.Workspace.Buttons.Button1
disc = game.Workspace.PlainDisc3.Decal
sound = Instance.new("Sound", disc)
radioOn = false

function onClicked()
	if not radioOn and disc.Texture == "rbxassetid://238387775" then
		radioOn = true
		sound.SoundId = "rbxassetid://210232032"
		sound:Play()
	button.Position=button.Position-Vector3.new(0, 0, -0.2)
	if radioOn and sound.SoundId == "rbxassetid://210232032" then
	button.Position=button.Position+Vector3.new(0, 0, -0.2)
			sound:Stop()
			radioOn = false
		end
	end
end

script.Parent.ClickDetector.MouseClick:connect(onClicked)

I hope you understand