chameleon efi - spaghetti code monster?

--[[

Chameleon EFI
v1.0

]]--
fs.delete("/boot.log")

local w, h = term.getSize()

isDebug = false

Chameleon = {
	Log = {
		l = function(level, msg)
			local msg = "\n[" .. os.time() .. "] [" .. level .. "] " .. tostring(msg)
			if isDebug then
				print(msg)
			end
			local h = fs.open("/boot.log", "a")
			h.write(msg)
			h.close()
		end,
	},
	printc = function(text, y)
		local w, h = term.getSize()
		x = math.ceil(math.ceil((w / 2) - (#text / 2)), 0)+1
		term.setCursorPos(x, y)
		write(text)
		return x
	end,
	drawlogo = function(x,y)
		local bg = term.getBackgroundColor()
		local fg = term.getTextColor()
		if term.isColor() then
			paintutils.drawLine(x,y,x,y+2, colors.lime)
			paintutils.drawLine(x,y+2,x+2,y+2, colors.lime)
			paintutils.drawLine(x,y,x+1,y,colors.lime)
			paintutils.drawPixel(x+2,y,colors.white)
			paintutils.drawPixel(x+3,y,colors.black)
		else
			paintutils.drawLine(x,y,x,y+3, colors.white)
			paintutils.drawLine(x,y+3,x+2,y+3, colors.white)
			paintutils.drawLine(x,y,x+1,y,colors.white)
			paintutils.drawPixel(x+2,y,colors.white)
			paintutils.drawPixel(x+3,y,colors.white)
		end
		term.setBackgroundColor(bg)
		term.setTextColor(fg)
	end,
	Status = "",
	Running = true
}

startupKey = function()
	while true do
		local event, arg = os.pullEvent()
		if event=='chameleon_ready' then
			Chameleon.Log.l("BOOT", "No key. Starting normally.")
			return nil
		elseif event == "key" then
			Chameleon.Log.l("BOOT", "Boot Key: "..arg)
			return arg
		end
	end
end

local function BootScreen()
	local c = 0
	while Chameleon.Running do

		paintutils.drawFilledBox(1,h - 6, w, h, colors.gray)

		if c == 0 then
			term.setCursorPos(w / 2 - 1, h - 3)
			term.write("0 o o")
		elseif c == 1 then
			term.setCursorPos(w / 2 - 1, h - 3)
			term.write("o 0 o")
		elseif c == 2 then
			term.setCursorPos(w / 2 - 1, h - 3)
			term.write("o o 0")
		end
		c = c + 1
		if c > 2 then
			c = 0
		end

		term.setTextColor(colors.lightGray)
		Chameleon.printc(Chameleon.Status, h - 5)
		term.setTextColor(colors.white)

		Chameleon.drawlogo(w / 2, h / 2 - 2)

		sleep(0.5)
	end
end

parallel.waitForAll(function() sleep(2) os.queueEvent('chameleon_ready') end, function() key = startupKey() end)

if key == keys.z then
	Chameleon.Log.l("BOOT", "Starting shell, goodbye!")
	term.setBackgroundColor(colors.black)
	term.setTextColor(colors.white)
	term.clear()
	term.setCursorPos(1,1)

	print("Chameleon is no longer running.")
	print("You are in the system shell, run exit to reboot.")
	os.run(getfenv(), "/rom/programs/shell")

	os.reboot()
elseif key == keys.x then
	Chameleon.Log.l("BOOT", "Custom boot script")
	term.setBackgroundColor(colors.gray)
	term.setTextColor(colors.lightGray)
	term.clear()
	Chameleon.printc("Custom Bootup Script", h - 3)
	Chameleon.printc("Please type in a boot script to start.", h - 2)
	term.setCursorPos(1,h)

	term.setBackgroundColor(colors.black)
	term.setTextColor(colors.white)
	term.clearLine()
	script = read()

	pcall(function()shell.run(script)end) --this is a placeholder by the way, give me slack.

	os.reboot()
end

term.setBackgroundColor(colors.gray)
term.clear()
parallel.waitForAll(function() BootScreen() end, function() os.run(getfenv(), "/boot") end)

local r = ChameleonDone() --this is called after the startup script is done executing
--ChameleonDone is used for executing the actual code.
print(r[2])