View difference between Paste ID: gL5Vi8SB and 54ss9M6h

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 --                 Stripmining turtle                   --
 ----------------------------------------------------------
 --                   Version 1.3.2                      --
 ----------------------------------------------------------
 -- Makes the turtle mine straight down to the bedrock.  --
 -- Usege: dig <max Y> <length>                          --
 -- <max Y> - maximum height for mining                  --
 -- <length> - number of blocks to mine forward          --
 -- (return) - go back to the starting point.            --
 ----------------------------------------------------------
 -- Based on a script pastebin.com/JbFMHaNg by Eonsv     --
 -- Tested with CC 1.5                                   --
 -- Don't forget to use chunkloaders!                    --
 ----------------------------------------------------------
 
 --Tests wether a file with the filename name exists.
 --Returns true if it does and false if not
 function fileExists(name)
    local f = io.open(name,'r')
    if (f ~= nil) then
 		f:close()
 		return true
 	else
 		return false
 	end
 end
 
 local arg = {...}
 
 --Saves current position to file
 function save()
 	local str = ''
 	str = str..y..'\n'
 	str = str..x..'\n'
 	str = str..distance..'\n'
 	local file = io.open('save', 'w')
 	file:write(str)
 	file:close()
 end
 
 --Consumes a stack of fuel from the 2nd enderchest
 function refuel(fuel)
-	if(turtle.getFuelLevel() ="unlimited") then
+	if(turtle.getFuelLevel()=="unlimited") then
 		return true
 	end
 	print('Refueling')
 	turtle.select(2)
 	while(not turtle.placeUp()) do
 		turtle.digUp()
 		turtle.attackUp()
 	end
 	turtle.select(16)
 	while(not turtle.suckUp()) do
 		sleep('No fuel found. Sleeping.', 10)
 	end
 	turtle.refuel(64)
 	turtle.select(2)
 	turtle.digUp()
 	if(turtle.getFuelLevel() <= fuel) then
 		sleep('Refueling failed!', 10)
 		dump()
 		refuel(200)
 	end
 end
 
 --Dumps all items into the 1st enderchest
 function dump()
 	turtle.select(1)
 	while(not turtle.placeUp()) do
 		turtle.digUp()
 		turtle.attackUp()
 	end
 	for i = 3, 16 do
 		if(turtle.getItemCount(i) > 0) then
 			turtle.select(i)
 			while(not turtle.dropUp()) do
 				sleep('Dropoff chest is full. Sleeping.', 10)
 			end
 		end
 	end
 	turtle.select(1)
 	turtle.digUp()
 	print('Dropoff successful')
 end
 
 function dropoff()
 	local empty = 0
 	--Calculates number of empty slots
 	for i = 2, 16 do
 		if(turtle.getItemCount(i) == 0) then
 			empty = empty + 1
 		end
 	end
 	--Dumps items if the inventory is full
 	if(empty == 0) then
 		dump()
 	end
 end
 
 --Clears the screen
 function clear()
 	term.clear()
 	term.setCursorPos(1, 1)
 end
 
 --Sleeps for %time% seconds, while displaying %text% and counting down
 function sleep(text, time)
 	for i = 0, time - 1 do
 		clear()
 		print(text)
 		print('Countdown: '..time - i..'s.')
 		os.sleep(1)
 	end
 end
 
 --Returns true if successful, and false if the block is bedrock
 local function bedrockTest()
 	local test
 	test = turtle.down()
 	return test
 end
 
 --Moves up until reaching initial height
 function moveUp()
 	for i = 1, y do
 		refuel(200)
 		while(not turtle.up()) do
 			turtle.attackUp()
 			turtle.digUp()
 		end
 	end
 end
 
 --Digging down until bedrock
 function digDown()
 	local fail = 0
 	while(true) do
 		dropoff()
 		refuel(500)
 		turtle.digDown()
 		if(not bedrockTest()) then
 				while(turtle.detectDown() == false) do
 					turtle.attackDown()
 					turtle.down()
 				end
 			os.sleep(0.2)
 			fail = fail + 1
 			if(fail == 6) then
 				break
 			end
 		end
 	end
 end
 
 --Mining loop
 function loop()
 	while(x > 0) do
 		clear()
 		print('Blocks left to mine: '..x)
 		digDown()
 		print('Hit bedrock, moving up '..y..' blocks')
 		moveUp()
 		while(not turtle.forward()) do
 			turtle.attack()
 			turtle.dig()
 		end
 		dump()
 		x = x - 1
 		save()
 	end
 end
 
 --Init sequence
 function init()
 	clear()
 	y = tonumber(arg[1])
 	y = y - 1
 	x = tonumber(arg[2])
 	if(arg[3] ~= nil) then
 		distance = x
 		print('Return mode on, distance: '..distance..' blocks')
 	else distance = 0
 	end
 	while(turtle.getItemCount(1) ~= 1) do
 		sleep('Wrong number of items in slot 1. Place one dropoff ender chest.', 5)
 	end
 	save()
 	-- Creating startup file to continue mining after server restarts
 	if(not fileExists('startup')) then
 		local file = io.open('startup', 'w')
 		file:write("shell.run(\'dig\')")
 		file:close()
 	end
 	loop()
 end
 
 --------
 --MAIN--
 --------
 if(not fileExists('startup')) then
 	for i = 1, 2 do
 		if(arg[i] == nil) then
 			clear()
 			print('Usage: dig <max Y> <length> return')
 			print()
 			print('<max Y> - maximum height for mining (e.g. your Y coordinate).')
 			print('<length> - number of blocks to mine forward.')
 			print('return - optional command to make the turtle go back to the starting point.')
 			do return end
 		end
 	end
 	init()
 else
 	clear()
 	--Reading save file
 	local file = io.open('save', 'r')
 	y = tonumber(file:read('*l'))
 	x = tonumber(file:read('*l'))
 	distance = tonumber(file:read('*l'))
 	file:close()
 	--If rebooted while dumping items
 	if(turtle.getItemCount(1) == 0) then
 		turtle.select(1)
 		turtle.digUp()
 		dump()
 		while(turtle.getItemCount(1) == 0) do
 			sleep('Missing chest in slot 1.', 10)
 		end
 	end
 	loop()
 end
 
 --Finishing
 shell.run('delete', 'save')
 shell.run('delete', 'startup')
 print('Done!')
 
 --Going to the starting point
 if distance > 0 then
 	turtle.turnRight()
 	turtle.turnRight()
 		while(distance > 0) do
 		clear()
 		print('Going back '..distance..' blocks')
 		while(not turtle.forward()) do
 			turtle.attack()
 			turtle.dig()
 		end
 		distance = distance - 1
 	end
 print('Done!')
 end