View difference between Paste ID: dSA6QRrF and gZtywPm1

 term.clear()
 term.setCursorPos(1,1)
 sel = 0
 fuelThreshold = 300
 if turtle.getFuelLevel() == "unlimited" then
         turtle.getFuelLevel = function()
                 return 2 + fuelThreshold
         end
 end
 if fs.exists("coords") == false then
 	print("Hi, I am your mining robot!\n\nI will need to ask you a couple of questions before I start mining:\n\nWhat diameter would you like me to mine?\n")
 	 setSize =read()
 	print("\nCool! Now insert the turtles current y coordinate\n")
 	input = read()
 	setDepth = input-5
 	print("\nJust one more thing- put any blocks you don't want me to mine in slots 1-4 and press enter.. or just leave it empty to mine everything (I will be slower the more you put there)\n")
 	temp=read()
 	setJunkSlots = 0
 	for i = 1,4 do
 		if turtle.getItemCount(i) ~= 0 then
 			setJunkSlots = setJunkSlots + 1
 		end
 	end
 	print("\nOkay, I will start mining now :D")
 
 
 	w = fs.open("coords","w")
 	w.write(setSize.."\n"..setDepth.."\n1\n1\n1\n0\n"..setJunkSlots)
 	w.close()
 	w = fs.open("startup","w")
 	w.write('shell.run("dig")')
 	w.close()
 	sleep(3)
 	term.clear()
 	term.setCursorPos(1,1)
 
 	w = fs.open("coords2","w")
 	w.write(setSize.."\n"..setDepth.."\n1\n1\n1\n0\n"..setJunkSlots)
 	w.close()
 	w = fs.open("startup","w")
 	w.write('shell.run("dig")')
 	w.close()
 	sleep(3)
 	term.clear()
 	term.setCursorPos(1,1)
 
 end
 
 --Gets the necessary variables from the file coords
 
 function Load()
 	h = fs.open("coords","r")
 	size = tonumber(h.readLine(1))
 	depth = tonumber(h.readLine(2))
---A backup file in case the first one is corrupted.
+
 	y = tonumber(h.readLine(4))
 	z = tonumber(h.readLine(5))
 	facing = tonumber(h.readLine(6))
 	junkSlots = tonumber(h.readLine(7))
 	h.close()
 end
 function Load2()
 	h = fs.open("coords2","r")
 	size = tonumber(h.readLine(1))
 	depth = tonumber(h.readLine(2))
 	x = tonumber(h.readLine(3))
 	y = tonumber(h.readLine(4))
 	z = tonumber(h.readLine(5))
 	facing = tonumber(h.readLine(6))
 	junkSlots = tonumber(h.readLine(7))
 	h.close()
 end
 function drop(fslot,lslot)
 	for i=fslot,lslot do
 		turtle.select(i)
 		while turtle.drop() == false and turtle.getItemCount(i) ~= 0 do
---Currently saves to two files for backup purposes. Will be broken up later for unloaded chunk handling.
+
 			sleep(2)
 		end
 	end
 end
 function save()
         s = fs.open("coords","w")
         s.writeLine(size)
         s.writeLine(depth)
         s.writeLine(x)
         s.writeLine(y)
         s.writeLine(z)
         s.writeLine(facing)
 		s.writeLine(junkSlots)
         s.close()
 
         s = fs.open("coords2","w")
         s.writeLine(size)
         s.writeLine(depth)
         s.writeLine(x)
         s.writeLine(y)
         s.writeLine(z)
         s.writeLine(facing)
 		s.writeLine(junkSlots)
         s.close()
 end
 --save function, prints the turtles orientation and coords to a file
 function rflforw()
 	if turtle.forward() == true then
 		if facing == 0  then
 		  x = x+1
 		  save()
 		elseif facing == 1 then
 		  y= y-1
 		  save()
 		elseif facing == 2  then
 		  x = x - 1
 		  save()
 		elseif facing == 3 then
 		  y = y + 1
 		  save()
 		else
 			error("Invalid facing variable")
 		end
 	else
 		print("Can't move forward, trying again...")
 		while turtle.forward() == false do
 			turtle.dig()
 			sleep(0.3)
 		end
 		if facing == 0  then
 		  x = x+1
 		  save()
 		elseif facing == 1 then
 		  y= y-1
 		  save()
 		elseif facing == 2  then
 		  x = x - 1
 		  save()
 		elseif facing == 3 then
 		  y = y + 1
 		  save()
 		end
 	end
 end
 --refuel-less forward function
 function dig()
   turtle.dig()
 end
 function digdown()
    turtle.digDown()
 end
 function digup()
   turtle.digUp()
 end
 function refuel()
 	local char = ""
 	if turtle.getFuelLevel() < fuelThreshold then
 		if turtle.getItemCount(16) == 0 then
 			oldfacing = facing
 			oldx = x
 			oldy = y
 			oldz = z
 			while facing ~= 1 do
 				left()
 			end
 			while y ~= 1 do
 				rflforw()
 			end
 			while facing ~= 2 do
 				left()
 			end
 			while x ~= 1 do
 				rflforw()
 			end
 			while z ~= 1 do
 				up()
 			end
 			drop(junkSlots + 1, 15)
 			while facing ~= 1 do
 				left()
 			end
 			turtle.select(16)
 			turtle.drop()
 			turtle.suck()
 			while turtle.getItemCount(16) < 16 do
 				print('Not enough fuel, Refill the chest and press enter')
 				temp=read()
 				turtle.drop()
 				turtle.suck()
 				turtle.refuel(1)
 			end
 			while facing ~= 0 do
 				left()
 			end
 			while z ~= oldz do
 				down()
 			end
 			while x ~= oldx do
 				rflforw()
 			end
 			while facing ~= 3 do
 					left()
 			end
 			while y ~= oldy do
 					forw()
 			end
 			while facing ~= oldfacing do
 					left()
 			end
 			else
 				while true do
 					turtle.select(16)
 					turtle.refuel(1)
 					turtle.select(1)
 					if turtle.getFuelLevel() > fuelThreshold then
 						break
 					elseif turtle.getItemCount(16) == 0 then
 						refuel()
 					end
 				end
 			end
 	end
 end
 function forw()
     refuel()
 	if turtle.forward() == true then
 		if facing == 0  then
 		  x = x+1
 		  save()
 		elseif facing == 1 then
 		  y= y-1
 		  save()
 		elseif facing == 2  then
 		  x = x - 1
 		  save()
 		elseif facing == 3 then
 		  y = y + 1
 		  save()
 		else
 			error("Invalid facing variable")
 		end
 	else
 		print("Can't move forward, trying again...")
 		while turtle.forward() == false do
 			turtle.dig()
 			sleep(0.3)
 		end
 		if facing == 0  then
 		  x = x+1
 		  save()
 		elseif facing == 1 then
 		  y= y-1
 		  save()
 		elseif facing == 2  then
 		  x = x - 1
 		  save()
 		elseif facing == 3 then
 		  y = y + 1
 		  save()
 		end
 	end
 end
 function down()
         if turtle.down() == true then
                 z = z + 1
         else
 				print("Something is blocking my way down, trying again!")
                 while turtle.down() == false do
                         sleep(0.3)
 						digdown()
                 end
 				z= z + 1
         end
 
 end
 function up()
         if turtle.up() == true then
                 z = z - 1
         else
 				print("Something is blocking my way up, trying again!")
                 while turtle.up() == false do
                         sleep(0.3)
 						digup()
                 end
 				z= z - 1
         end
 
 end
 function left()
         turtle.turnLeft()
         facing = facing - 1
         facing = facing % 4
         save()
 end
 function right()
         turtle.turnRight()
         facing = facing + 1
         facing = facing % 4
         save()
 end
 function comine()
 	local isJunkd = false
 	local isJunku = false
 	sel = sel + 1
 	if junkSlots == 0 then
 		sel = 0
 	else
 		sel = sel % junkSlots
 	end
 	if sel == 0 then
 		for i = 1 , junkSlots do
 			turtle.select(i)
 			if turtle.compareUp()== true then
 				isJunku = true
 			end
 			if turtle.compareDown()== true then
 				isJunkd = true
 			end
 		end
 	else
 		for i = junkSlots , 1, -1 do
 			turtle.select(i)
 			if turtle.compareUp()== true then
 				isJunku = true
 			end
 			if turtle.compareDown()== true then
 				isJunkd = true
 			end
 		end
 	end
 	if isJunku == false then
 		digup()
 	end
 	if isJunkd == false then
 		digdown()
 	end
 
 end
 function diglayer()
         for j = 1,size - 1 do
                         comine()
                         dig()
                         forw()
                         if turtle.getItemCount(15) > 0 then
                                 oldfacing = facing
                                 oldx = x
                                 oldy = y
                                 oldz = z
                                 while facing ~= 1 do
                                         left()
                                 end
                                 while y ~= 1 do
                                         forw()
                                 end
                                 while facing ~= 2 do
                                         left()
                                 end
                                 while x ~= 1 do
                                         forw()
                                 end
                                 while z ~= 1 do
                                         up()
                                 end
                                 drop(junkSlots + 1, 15)
                                 turtle.select(sel + 1)
                                 while facing ~= 0 do
                                         left()
                                 end
                                 while z ~= oldz do
                                         down()
                                 end
                                 while x ~= oldx do
                                         forw()
                                 end
                                 while facing ~= 3 do
                                         left()
                                 end
                                 while y ~= oldy do
                                         forw()
                                 end
                                 while facing ~= oldfacing do
                                         left()
                                 end
                         end
                 end
         end
 function program()
 	if size % 2 == 0 then
 		for i = 1 , size / 2 - 1 do
 			diglayer()
 			comine()
 			left()
 			dig()
 			forw()
 			left()
 			diglayer()
 			comine()
 			right()
 			dig()
 			forw()
 			right()
 			sleep(0.1)
 		end
 		diglayer()
 		comine()
 		left()
 		dig()
 		forw()
 		left()
 		diglayer()
 		comine()
 		left()
 		for i = 1, size-1 do
 			forw()
 		end
 		left()
 	else
 		for i = 1, (size - 1)/2 do
 			diglayer()
 			comine()
 			left()
 			dig()
 			forw()
 			left()
 			diglayer()
 			comine()
 			right()
 			dig()
 			forw()
 			right()
 			sleep(0.1)
 		end
 		diglayer()
 		comine()
 		right()
 		while y ~= 1 do
 			forw()
 		end
 		right()
 		while x ~= 1 do
 			forw()
 		end
 		left()
 		left()
 	end
 end
 if(pcall(Load) == false) then
 	Load2()
 end
 refuel()
 refuel()
 if x ~= 1 or y ~= 1 or facing ~= 0 then
         while facing ~= 1 do
             left()
         end
         while y ~= 1 do
             forw()
         end
         while facing ~= 2 do
             right()
         end
         while x ~= 1 do
             forw()
         end
         while facing ~= 0 do
             left()
         end
 end
 while z ~= depth do
         program()
         for i = 1, 3 do
 			if z == depth then
 				break
 			end
 			digdown()
 			down()
 		end
 end
 program()
 while facing ~=2 do
         left()
 end
 while z ~= 1 do
         up()
 end
 drop(1,16)
 fs.delete("startup")
 fs.delete("coords")
 print("I am done now :D")