Script stops printing the count of for loop, and it also doesn't work anymore?

I have this script to make a loading screen, and it has a for loop wich sets the imagelabel's imagetransparency from 1 to 0 and then from 0 to 1. The problem is, it waits 0.4 seconds before changing, stops on -0.8, waits about 2 seconds and just doesn't work anymore. This is the script:

local Gui = script:WaitForChild("LoadingGui")
local player = game.Players.LocalPlayer
local backG = Gui.Back
local FranXXicon = backG.Icon
wait(6)
for i = -1,0,0.1 do
	wait(0.4)
	if i == -1 then
		FranXXicon.ImageTransparency = 1
		print(i)
	elseif i == -0.9 then
		FranXXicon.ImageTransparency = 0.9
		print(i)
	elseif i == -0.8 then
		FranXXicon.ImageTransparency = 0.8
		print(i)
	elseif i == -0.7 then
		FranXXicon.ImageTransparency = 0.7
		print(i)
	elseif i == -0.6 then
		print(i)
		FranXXicon.ImageTransparency = 0.6
	elseif i == -0.5 then
		print(i)
		FranXXicon.ImageTransparency = 0.5
	elseif i == -0.4 then
		print(i)
		FranXXicon.ImageTransparency = 0.4
	elseif i == -0.3 then
		print(i)
		FranXXicon.ImageTransparency = 0.3
	elseif i == -0.2 then
		print(i)
		FranXXicon.ImageTransparency = 0.2
	elseif i == -0.1 then
		print(i)
		FranXXicon.ImageTransparency = 0.1
	elseif i == -1.3877787807814e-16 then
		print(i)
		FranXXicon.ImageTransparency = 0
	end
end
for i = 0,1,0.1 do
	if i == 0.1 then
		print(i)
		FranXXicon.ImageTransparency = 0.1
	elseif i == 0.2 then
		print(i)
		FranXXicon.ImageTransparency = 0.2
	elseif i == 0.3 then
		print(i)
		FranXXicon.ImageTransparency = 0.3
	elseif i == 0.4 then
		print(i)
		FranXXicon.ImageTransparency = 0.4
	elseif i == 0.5 then
		print(i)
		FranXXicon.ImageTransparency = 0.5
	elseif i == 0.6 then
		print(i)
		FranXXicon.ImageTransparency = 0.6
	elseif i == 0.7 then
		print(i)
		FranXXicon.ImageTransparency = 0.7
	elseif i == 0.8 then
		print(i)
		FranXXicon.ImageTransparency = 0.8
	elseif i == 0.9 then
		print(i)
		FranXXicon.ImageTransparency = 0.9
	elseif i == 1 then
		print(i)
		FranXXicon.ImageTransparency = 1
	end
end