View difference between Paste ID: 8Tg6khn3 and We5K7FgF

 -- branch
 -- Creates a 1x1x3 tunnel of the length specified by the user
 --    then mines 3 blocks to the right and tunnels back
 -- Torches, if supplied, will be placed on the right-hand wall at 8 block intervals
 -- Written by HarvDad, March 2014
 
 args = {...}
 nArgs = #args
 
-print("branch: Rev 1.3")
+print("branch: Rev 1.0")
 
 loop = 0;
 x = 0
 y = 0
 z = 0
 face = 0
 minimumFuel = 100
 missionMessage = "Mission complete."
 abort = false
 local currentFuelLevel = turtle.getFuelLevel()
 
 if nArgs == 0 or (nArgs == 1 and args[1]== "help") then
 	print("Creates a 2x2 tunnel with sealed sides.")
 	print("Place fuel in slot 1")
 	print("Place patch material (like cobblestone) in slot 2.")
 	print("If torches are desired, place torches in slot 16.")
 	print("Usage: branch <length>")
 	return
 end
 
 if nArgs ~= 1 then
   print("Usage: branch <length>")
   return
 end
 
 length = tonumber(args[1])
 if length == nil then
   print("\"", args[1], "\" is not a valid length")
   return
 end
 if length < 1 then
   print("length must be a positive number greater than zero")
 end
 
 targetArea = length
 areaCovered = 1;
 
 
 function left()
  if face == 0 then face = 1 turtle.turnLeft() return end
  if face == 1 then face = 2 turtle.turnLeft() return end
  if face == 2 then face = 3 turtle.turnLeft() return end
  if face == 3 then face = 0 turtle.turnLeft() return end
  print("function left\(\): Bad face value: ", face)
 end
 
 function right()
  if face == 0 then face = 3 turtle.turnRight() return end
  if face == 1 then face = 0 turtle.turnRight() return end
  if face == 2 then face = 1 turtle.turnRight() return end
  if face == 3 then face = 2 turtle.turnRight() return end
  print("function right\(\): Bad face value: ", face)
 end
 
 function up()
 	success = false
 
 	repeat
 		while turtle.detectUp() do	-- This loop added in case of falling sand or whatever
 		  turtle.digUp()
 		end
 	  success = turtle.up()
 	until success
   y = y+1
 end
 
 function rise(nBlocks)
   local i
   for i=1,nBlocks do
     up()
   end
 end
 
 function descend(nBlocks)
   local i
   for i=1,nBlocks do
     down()
   end
 end
 
 function down()
   if turtle.detectDown() then
     turtle.digDown()
   end
   turtle.down()
   y = y-1
 end
 
 
 function forward()
 	while turtle.detect() do	-- This loop added in case of falling sand or whatever
 	  turtle.dig()
 	end
 	for i=1,10 do
 		if turtle.forward() then
 			break
 		end
 		turtle.attack()
 		sleep(2)
 	end
   	if face == 0 then z = z+1 return end
   	if face == 1 then x = x-1 return end
   	if face == 2 then z = z-1 return end
   	if face == 3 then x = x+1 return end
 end
 
 function patch()
 	turtle.select(2)
 	turtle.place()
 end
 
 function patchUp()
 	turtle.select(2)
 	turtle.placeUp()
 end
 
 function patchDown()
 	turtle.select(2)
 	turtle.placeDown()
 end
 
 addTorch = true
-torchSpacing = 8
+torchSpacing = 3
-torchSpot = 6
+torchSpot = 7
 
 function mineForward()
 	forward()
 
 	while turtle.detectUp() do	-- This loop added in case of falling sand or whatever
 	  turtle.digUp()
---	  turtle.suckUp()
+	  turtle.suckUp()
 	end
 
 	if turtle.detectDown() then
 		turtle.digDown()
---		turtle.suckDown()
+		turtle.suckDown()
 	end
 
 	if addTorch then
 		if (torchSpot % torchSpacing) == 0 then
 			left()
 			left()
 			turtle.select(16)
 			turtle.place()
 			right()
 			right()
 		end
 	end
 	torchSpot = torchSpot + 1
 end
 
 function setFace(f)
 	if f == 0 then
 	  if face == 0 then return end
 	  if face == 1 then right() return end
 	  if face == 2 then right() right() return end
 	  if face == 3 then left() return end
 	end
 
 	if f == 1 then
 	  if face == 0 then left() return end
 	  if face == 1 then return end
 	  if face == 2 then right() return end
 	  if face == 3 then right() right() return end
 	end
 
 	if f == 2 then
 	  if face == 0 then left() left() return end
 	  if face == 1 then left() return end
 	  if face == 2 then return end
 	  if face == 3 then right() return end
 	end
 
 	if f == 3 then
 	  if face == 0 then right() return end
 	  if face == 1 then left() left() return end
 	  if face == 2 then left() return end
 	  if face == 3 then return end
 	end
 end
 
 function checkFuel()
 	if currentFuelLevel == "unlimited" then
 		return true
 	end
 
 	if currentFuelLevel < minimumFuel then
 	  if not turtle.refuel(200) then
 		  areaCovered = targetArea
 		  missionMessage = "Mission aborted due to low fuel."
 		  abort = true
 	    return false
 	  end
 	end
   return true
 end
 
 function home(targetY)
 --  print("home:face ", face, ", x = ", x, ", z = ", z)
   if x < 0 then
 	setFace(3)
 	while x < 0 do
 	  forward()
 	end
   else
     if x > 0 then
   	  setFace(1)
 	  while x > 0 do
 	    forward()
 	  end
     end
   end
 
   if z < 0 then
 	setFace(0)
 	while z < 0 do
 	  forward()
 	end
   else
     if z > 0 then
   	  setFace(2)
 	  while z > 0 do
 	    forward()
 	  end
     end
   end
 end
 
 function dump()
 	for i=2,14 do
 		turtle.select(i)
 		turtle.dropDown()
 	end
 end
 
 function branchLoop()
-	torchSpot = 6
+	torchSpot = 7
 	local i
 
 	for i=1,length do
 		mineForward()
 	end
 
 	right()
 
 	for i=1,3 do
 		mineForward()
 	end
 
 	right()
 
 	for i=1,length do
 		mineForward()
 	end
 
 	setFace(0)
 	down()
 
 	if turtle.detectDown() then
 		turtle.select(15)
 		if not turtle.compareDown() then
 			turtle.digDown()
---			turtle.suckDown()
+			turtle.suckDown()
 			turtle.placeDown()
 		end
 	end
 	if turtle.compareDown() then
 		dump()
 	end
 end
 
 -- MAIN PROGRAM
 
 turtle.select(1)
 
 print("Current Fuel Level: ", currentFuelLevel)
 
 if currentFuelLevel ~= "unlimited" then
 	if currentFuelLevel < minimumFuel then
 		if not turtle.refuel() then
 		  print("No fuel")
 		  return
 		end
 	end
 end
 
 for loop=1,5 do
 	addTorch = false
 
 	rise(1)
 	for i=1,5 do
 	  mineForward()
 	end
 	turtle.back()
 	turtle.back()
 	left()
 	addTorch = true
 	branchLoop()
 end
 
 
 print(missionMessage, " Current fuel level is ", turtle.getFuelLevel())