bios:14: [string "Star"]:32: 'then' expected

term.clear()
term.setCursorPos(1,1)
print("Dump chest goes in 16.")
print("Torch chest goes in 15.")
print("Fuel chest goes in 14.")
print("Torches go in 13.")
print("Put items in.")
print("Press any key to continue.")
os.pullEvent("key")
print("How far do I dig?")
x = read()
print("How far apart do torches go? Recommend:6")
y = read()
	
--Makes sure there isnt gravel or sand fallen down.
function digInfront()
	turtle.dig()
	while turtle.detect() do
		turtle.dig()
		sleep(0.1)
	end
end
	
--Makes sure there isnt gravel or sand fallen down.
function digAbove()
	turtle.digUp()
	sleep(0.5)
	while turtle.detectUp() do
		turtle.digUp()
		sleep(0.5)
	end
end
	
--Check/Place Torches
function torchManager()
	if turtle.getItemCount(13) < 1 then
		turtle.select(15)
		turtle.placeDown()
			turtle.select(13)
			turtle.suckDown()
			turtle.select(15)
		turtle.digDown()
		turtle.select(13)
		turtle.place()
		turtle.select(1)
	else
		turtle.select(13)
		turtle.place()
		turtle.select(1)
	end
end
	
--Places chest in last slot and drops items from slots 1-13 into chest, picks up chest.
function clearInv()
	turtle.select(16)
	turtle.place()
		for i = 1,12 do
			turtle.select(i)
			turtle.drop()
		end
		turtle.select(16)
	turtle.dig()
	turtle.select(1)
	end
	
--Checks for full inventory if full checks to see if it can place chest if it can then does clearInv().
function invMngr()
	turtle.getItemCount(12)
	if turtle.getItemCount(12) >= 1 then
		clearInv()
	end
end
	
--Does invMngr if facing forward.
function invMngrFront()
	turtle.getItemCount(12)
	if turtle.getItemCount(12) >= 1 then
		turtle.turnRight()
		turtle.turnRight()
		invMngr()
		turtle.turnRight()
		turtle.turnRight()
	end
end
	
--Does invMngr if facing right.
	function invMngrRight()
	turtle.getItemCount(12)
	if turtle.getItemCount(12) >= 1 then
		turtle.turnRight()
		invMngr()
		turtle.turnLeft()
	end
end
	
--Does invMngr if facing left.
	function invMngrLeft()
	turtle.getItemCount(12)
	if turtle.getItemCount(12) >= 1 then
		turtle.turnLeft()
		invMngr()
		turtle.turnRight()
	end
end
	
--Clears inventory takes a stack of fuel from fuel chest and refuels with it.
function fuelMngr()
	if turtle.getFuelLevel() == 0 then
		clearInv()
		turtle.select(14)
		turtle.place()
		turtle.select(1)
		turtle.suck()
		turtle.refuel()
		turtle.select(14)
		turtle.dig()
		turtle.select(1)
	end
end
	
--Digs a cross formation
function Digg()
	digInfront()
		invMngrFront()
	digAbove()
		invMngrFront()
	turtle.digDown()
		invMngrFront()
	turtle.turnRight()
	digInfront()
		invMngrRight()
	turtle.turnRight()
	turtle.turnRight()
	digInfront()
		invMngrLeft()
	t = t + 1 --Further tracks distance for torch placement.
		 if t >= y + 0 then --Checks if it places torches or nah.
		torchManager()
		t = t - y
	end
	turtle.turnRight() --Faces forward.
	m = m + 1 --Tracks force inventory clear
	if m >= 16 then
		clearInv()
		m = 0
	end
	fuelMngr()
	turtle.forward()
end

--For starting torch.
m = 0 --Defines the force inventory clear variable.
digInfront()
digAbove()
turtle.digDown()
turtle.turnRight()
digInfront()
turtle.turnRight()
turtle.turnRight()
digInfront()
turtle.select(13)
turtle.place()
turtle.select(1)
turtle.turnRight()
turtle.forward()
x = x - 1 --To count it as a dug layer for how far turtle goes.
m = m + 1 --To count for force inventory clear

--Time to make it run the cross digger.
t = 0			 --Tracks distance for torch placement.
for i = 1,x do	--Tracks how far turtle goes.
	Digg()
end

if turtle.getFuelLevel = 0 then

if turtle.getFuelLevel==0 then

if turtle.getFuelLevel == 0 then