How to enable a script through the touch of a part from a player?

So i have a part in my place that acts as lava and i wanted to make it so when the player steps into the lava the set frames from the screen gui would fade in and out as to make it look like the player is on fire. Heres what i came up to

out1 = script.Parent.outleft
out2 = script.Parent.outtop 
out3 = script.Parent.outright  
out4 = script.Parent.outbottom 
in1 = script.Parent.inleft 
in2 = script.Parent.intop 
in3 = script.Parent.inright 
in4 = script.Parent.inbottom 
lava = workspace.burningLava
local player = game.Players.LocalPlayer
local touch=true

function startburning(part)
	if touch==true then
	if part.Name == "burningLava" then
	for i=1,0.5,-0.1 do
	out1.BackgroundTransparency=i
	out2.BackgroundTransparency=i
	out3.BackgroundTransparency=i
	out4.BackgroundTransparency=i
    wait(0.1)
	end
	for i=1,0.7,-0.1 do
    in1.BackgroundTransparency=i
    in2.BackgroundTransparency=i
    in3.BackgroundTransparency=i
    in4.BackgroundTransparency=i
    wait(0.1)
	end
	end
	touch=false
	end
	end
	
function endburning(part)
	if touch==false then
	if part.Name == "burningLava" then
	while out1.BackgroundTransparency<=1 do
	out1.BackgroundTransparency=out1.BackgroundTransparency+0.1
	out2.BackgroundTransparency=out2.BackgroundTransparency+0.1
	out3.BackgroundTransparency=out3.BackgroundTransparency+0.1
	out4.BackgroundTransparency=out4.BackgroundTransparency+0.1
    wait(0.1)	
	end
	while in1.BackgroundTransparency<=1 do
    in1.BackgroundTransparency=in1.BackgroundTransparency+0.1
    in2.BackgroundTransparency=in2.BackgroundTransparency+0.1
    in3.BackgroundTransparency=in3.BackgroundTransparency+0.1
    in4.BackgroundTransparency=in4.BackgroundTransparency+0.1
    wait(0.1)	
    end
	end
	touch=true
	end
	end
player.Character.Humanoid.Touched:connect(startburning)
player.Character.Humanoid.TouchEnded:connect(endburning)

For some reason the localscript wont work thou. Pls halp.