showSplits = 1
framerules = 1

framerate = 39375000/655171
start = 197 + 21*framerules
stop = 0
split = 1
frames = 0
diff = 0
facing2 = 0
world12 = 0
world22 = 0
next = 0

comp = {}
comp[1] = 2293
comp[2] = 3825
comp[3] = 6433
comp[4] = 7840
comp[5] = 10907
comp[6] = 13071
comp[7] = 15193
comp[8] = 17891


while true do

	-- detect start

	joy = joypad.get();
	for button, value in pairs(joypad.get()) do
		if button == 'Reset' and value == true then
			start = emu.framecount() + 197 + 21*framerules
		end
	end

	-- detect end

	if stop == 1 then stop = 2 end

	for i = 0, 5 do
		if
				memory.readbyte((0x0016) + i) == 0x2d
			and	memory.readbyte(0x075F) == 7
			and 	memory.readbyte(0x01ED) == 242
			and	memory.readbyte(0x03AD) > 210
			and	stop == 0
		then
			stop = 1
		end
	end


	-- get time

	if stop < 2 then
		frames = emu.framecount() - start
	end

	time = (frames / framerate)
	minutes = math.floor(time / 60)
	seconds = time % 60

	if frames < 0 then
		minutes = 0
		seconds = 0
	end

	-- draw timer

	minutesString = string.format("%.0f", minutes)

	secondsString = string.format("%.3f", seconds)
	if seconds < 10 then secondsString = "0" .. secondsString end

	gui.drawBox(205, 228, 245, 234, "black", "black")
	gui.text(410, 455, minutesString .. ":" .. secondsString)


	-- detect split

	facing1 = memory.readbyte(0x0033)
	world11 = memory.readbyte(0x075F)
	world21 = memory.readbyte(0x0760)

	if
			(world11 > world12 or world21 > world22)
		and	(world11 > 0 or world21 > 1)
		and	(world11 ~= 3 or world21 ~= 1)
		and	frames > 100
	then
		next = 1
	end

	if
		(split == 8 and stop == 2)
		or
		(facing1 == 1 and facing2 == 0 and next == 1)
	then
		diff = (frames - comp[split]) / framerate
		split = split + 1
		next = 0
	end

	facing2 = memory.readbyte(0x0033)
	world12 = memory.readbyte(0x075F)
	world22 = memory.readbyte(0x0760)


	-- draw split

	diffString = string.format("%.3f", diff)
	if diff == 0 then diffString = "-" .. diffString end
	if diff > 0 then diffString = "+" .. diffString end

	if split > 1 and showSplits == 1 then
		gui.drawBox(164, 228, 195, 234, "black", "black")
		gui.text(330, 455, diffString)
	end


	emu.frameadvance()

end