Music script doesn't work. Why?

Hi!

I have made a music script for one of my games and it works, except for one thing. Even if the music is told to be off, it still plays the next song! I have put in a lot of code to prevent this but it still happens. I don't know why. Here is the code:

playing = false

	 local s1 = script.Parent.Parent.song
	local s2 = script.Parent.Parent.song2
	local s3 = script.Parent.Parent.song3
	local s4 = script.Parent.Parent.song4

	

	script.Parent.MouseButton1Down:connect(function()

	    if playing == false then -- check if audio is playing

	        playing = true -- allow the script to know if its on or not

	        script.Parent.Text = "Music: On" -- change the name like you wanted
			
			    s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()	
				wait(0.5)		
			
	        s1:Play() -- play all the music

	            wait(120)
	if script.Parent.Text == "Music: Off" then
				s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	end

	            s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	
	wait(1)
if script.Parent.Text == "Music: Off" then
				s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	end
	            s2:Play()

	            wait(106.371)
	if script.Parent.Text == "Music: Off" then
				s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()

	end

	            s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	wait(1)
if script.Parent.Text == "Music: Off" then
				s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	end
	             s3:Play()

	             wait(101)
	if script.Parent.Text == "Music: Off" then
				s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	end

	             s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	wait(1)
	if script.Parent.Text == "Music: Off" then
				s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	end

	            s4:Play()

	            wait(76)
	if script.Parent.Text == "Music: Off" then
				s1:Stop()
				s2:Stop()
				s3:Stop()
				s4:Stop()
	end

	            s4:Stop()
	wait(0.1)
	script.Parent.Text = "Music: Off"

	    else -- if audio is playing we want to stop it

	        playing = false


	            s1:Stop()

	            s2:Stop()

	           s3:Stop()

	           s4:Stop()
	
	  		   script.Parent.Text = "Music: Off"

	    end

	end)