View difference between Paste ID: QV9HP0yJ and vBsSi0E6

 tArgs = {...}
 
 local torchSlot = 15
 local fuelSlot = 16
 local torchCompareSlot = 14
 local torchCounter = 0
 local torchPlacePoint = 7
 local currentLevel = 0
 
 function refuel(fuelAmount)
  if fuelAmount == nil then fuelAmount = 1 end
  turtle.select(fuelSlot)
  if turtle.refuel(fuelAmount) == true then
    turtle.select(1)
    return true
  else
    turtle.select(1)
    return false
  end
 end
 
 function getFuel()
   return turtle.getFuelLevel()
 end
 
 function turnRight(revolutions)
   if revolutions == nil then revolutions = 1 end
   for i =1, revolutions do
     turtle.turnRight()
   end
 end
 
 function turnLeft(revolutions)
   if revolutions == nil then revolutions = 1 end
   for i = 1, revolutions do
     turtle.turnLeft()
   end
 end
 
 function digLayer()
  dig()
  goForward(1)
  digUp(2)
  turnRight()
  dig()
  goForward()
  turnLeft()
  digDown(2)
  turnLeft()
  goForward(2)
  dig()
  goForward(1)
  turnRight()
  digUp(2)
  turnRight()
  goForward(1)
  turnLeft()
  goDown(2)
 end
 
 function goUp(distance)
   if distance == nil then distance = 1 end
   for i = 1, distance do
     turtle.up()
 	currentLevel = currentLevel + 1
   end
 end
 
 function goDown(distance)
   if distance == nil then distance = 1 end
   for i = 1, distance do
     turtle.down()
 	currentLevel = currentLevel - 1
   end
 end
 
 function goForward(distance)
   if distance == nil then distance = 1 end
   for i = 1, distance do
     turtle.forward()
   end
 end
 
 function goBack(distance)
   if distance == nil then distance = 1 end
   for i = 1, distance do
     turtle.back()
   end
 end
 
 function turnAround()
   turnRight(2)
 end
 
 function digUp(distance)
   if distance == nil then distance = 1 end
   for i = 1, distance do
     while turtle.detectUp() == true do
 	  turtle.digUp()
 	  slee(0.5)
 	end
 	if distance > 1 then
 	  goUp()
 	end
   end
 end
 
 function dig(distance)
   if distance == nil then distance = 1 end
   for i = 1, distance do
     while turtle.detect() == true do
 	  turtle.dig()
 	  sleep(0.5)
 	end
   end
 end
 
 function digDown(distance)
   if distance == nil then distance = 1 end
   for i = 1, distance do
 	turtle.digDown()
 	sleep(0.5)
 	if distance > 1 then
 	  goDown()
 	end
   end
 end
 
 function goToFloor()
   if currentLevel > 0 then
     while turtle.detectDown == false do
       goDown()
 	  if currentLevel == 0 then
 	     print("Possibly over a chasm. Breaking")
 		 return false
 	  end
     end
   end
   return true
 end
 
 function placeTorch()
   turtle.select(torchSlot)
   if turtle.compareTo(torchCompareSlot) == true then
     if turtle.detectDown() == true then
 	  turnAround()
 	  goForward(1)
 	  if turtle.detectDown() == true then
 	    goBack(1)
         turtle.place()
 	    turnAround()
 	  end
     else
       if goToFloor() == true then
 	    turnAround()
 		goForward(1)
 		if turtle.detectDown() == true then
 		  goBack(1)
 		  turtle.place()
 		  turnAround()
 		end
 	  end
     end
   else
     print("Out of torches!")
   end
   turtle.select(1)
 end
 
 function returnToStart(distance)
   turnAround()
   goForward(distance)
   turnAround()
 end
 
 
 function checkTorchPlacement()
   torchCounter = torchCounter + 1
   if torchCounter == torchPlacePoint then
     placeTorch()
 	torchCounter = 0
   end
 end
 
 function dropLoad()
   for i = 1, 13 do
     turtle.select(i)
 	turtle.drop()
   end
   turtle.select(1)
 end
 
 if tArgs[1] == nil then
   print("Usage: miner <length of shaft")
 else
   shaftLength = tonumber(tArgs[1])
   for i = 1, shaftLength do
    print("Working on layer "..i)
    digLayer()
    checkTorchPlacement()
    if getFuel() == 0 then
      refuel(5)
    end
   end
   returnToStart(shaftLength)
   turnAround()
   dropLoad()
   turnAround()
   print("Job Done!")
 end