View difference between Paste ID: 5UZ0244J and 1MzKST2F

 -- Usage (program name) <Width> <Depth> <Length> <Direction>
 -- Place a chest with enough space for what you are digging behind the turtle before beginning
 -- Put any fuel in the first slot, if you don't want to have to refuel, use refuel<amount> before running this
 -- Make sure you keep the chunk(s) the turtle is digging in loaded, otherwise it will break
 
 rednet.open("left")
 
 local tArgs = { ... }
 if #tArgs ~= 4 then
 	print( "Usage: excavate <Width> <Depth> <Length> <Direction>" )
 	print( "Direction - 0 for down, 1 for up" )
 	return
 end
 
 
 local size1    = tonumber( tArgs[1] )
 local size2    = tonumber( tArgs[2] )
 local size3    = tonumber( tArgs[3] )
 local upordown = tonumber( tArgs[4] )
 if size1 < 1 then
 	print( "X size must be positive" )
 	return
 end
 if size2 < 1 then
 	print( "Depth must be positive" )
 	return
 end
 if size3 < 1 then
 	print( "Z size must be positive" )
 	return
 end
 if upordown~=0 and upordown~=1 then
 	print( "Invalid direction" )
 	return
 end
 
 
 local depth = 0
 local unloaded = 0
 local collected = 0
 
 local xPos,zPos = 0,0
 local xDir,zDir = 0,1
 
 local goTo -- Filled in further down
 local refuel -- Filled in further down
 
-	print( "Unloading items..." )
+
 	rednet.send(38, "unloading")
 	for n=2,16 do
 		unloaded = unloaded + turtle.getItemCount(n)
 		turtle.select(n)
 		turtle.drop()
 	end
 	collected = 0
 	turtle.select(1)
 end
 
 local function returnSupplies()
-	print( "Returning to surface..." )
+
 	rednet.send(38, "surface")
 	goTo( 0,0,0,0,-1 )
 
 	local fuelNeeded = x+y+z + x+y+z + 1
 	if not refuel( fuelNeeded ) then
 		unload()
 		print( "Waiting for fuel" )
 		while not refuel( fuelNeeded ) do
 			sleep(1)
 		end
 	else
 		unload()
 	end
-	print( "Resuming mining..." )
+
 	rednet.send(38, "mining")
 	goTo( x,y,z,xd,zd )
 end
 
 local function collect()
 	local bFull = true
 	local nTotalItems = 0
 	for n=1,16 do
 		local nCount = turtle.getItemCount(n)
 		if nCount == 0 then
 			bFull = false
 		end
 		nTotalItems = nTotalItems + nCount
 	end
 
 	if nTotalItems > collected then
 		collected = nTotalItems
 		if math.fmod(collected + unloaded, 50) == 0 then
 			print( "Mined "..(collected + unloaded).." items." )
 		end
 	end
 
 	if bFull then
 		print( "No empty slots left." )
 		return false
 	end
 	return true
 end
 
 function refuel( ammount )
 	local fuelLevel = turtle.getFuelLevel()
 	if fuelLevel == "unlimited" then
 		return true
 	end
 
 	local needed = ammount or (xPos + zPos + depth + 1)
 	if turtle.getFuelLevel() < needed then
 		local fueled = false
 		for n=1,16 do
 			if turtle.getItemCount(n) > 0 then
 				turtle.select(n)
 				if turtle.refuel(1) then
 					while turtle.getItemCount(n) > 0 and turtle.getFuelLevel() < needed do
 						turtle.refuel(1)
 					end
 					if turtle.getFuelLevel() >= needed then
 						turtle.select(1)
 						return true
 					end
 				end
 			end
 		end
 		turtle.select(1)
 		return false
 	end
 
 	return true
 end
 
 local function tryForwards()
-		print( "Not enough Fuel" )
+
 		rednet.send(38, "Needs fuel")
 		returnSupplies()
 	end
 
 	while not turtle.forward() do
 		if turtle.detect() then
 			if turtle.dig() then
 				if not collect() then
 					returnSupplies()
 				end
 			else
 				return false
 			end
 		elseif turtle.attack() then
 			if not collect() then
 				returnSupplies()
 			end
 		else
 			sleep( 0.5 )
 		end
 	end
 
 	xPos = xPos + xDir
 	zPos = zPos + zDir
 	return true
 end
 
 local function tryDown()
-		print( "Not enough Fuel" )
+
 		rednet.send(38, "Needs fuel")
 		returnSupplies()
 	end
 
 	while not turtle.down() do
 		if turtle.detectDown() then
 			if turtle.digDown() then
 				if not collect() then
 					returnSupplies()
 				end
 			else
 				return false
 			end
 		elseif turtle.attackDown() then
 			if not collect() then
 				returnSupplies()
 			end
 		else
 			sleep( 0.5 )
 		end
 	end
 
 	depth = depth + 1
 
 	return true
 end
 
 local function tryUp()
-		print( "Not enough Fuel" )
+
 		rednet.send(38,"Needs fuel")
 		returnSupplies()
 	end
 
 	while not turtle.up() do
 		if turtle.detectUp() then
 			if turtle.digUp() then
 				if not collect() then
 					returnSupplies()
 				end
 			else
 				return false
 			end
 		elseif turtle.attackUp() then
 			if not collect() then
 				returnSupplies()
 			end
 		else
 			sleep( 0.5 )
 		end
 	end
 
 	depth = depth - 1
 
 	return true
 end
 
 local function turnLeft()
 	turtle.turnLeft()
 	xDir, zDir = -zDir, xDir
 end
 
 local function turnRight()
 	turtle.turnRight()
 	xDir, zDir = zDir, -xDir
 end
 
 function goTo( x, y, z, xd, zd )
 	while depth > y do
 		if turtle.up() then
 			depth = depth - 1
 		elseif turtle.digUp() or turtle.attackUp() then
 			collect()
 		else
 			sleep( 0.5 )
 		end
 	end
 
 	if xPos > x then
 		while xDir ~= -1 do
 			turnLeft()
 		end
 		while xPos > x do
 			if turtle.forward() then
 				xPos = xPos - 1
 			elseif turtle.dig() or turtle.attack() then
 				collect()
 			else
 				sleep( 0.5 )
 			end
 		end
 	elseif xPos < x then
 		while xDir ~= 1 do
 			turnLeft()
 		end
 		while xPos < x do
 			if turtle.forward() then
 				xPos = xPos + 1
 			elseif turtle.dig() or turtle.attack() then
 				collect()
 			else
 				sleep( 0.5 )
 			end
 		end
 	end
 
 	if zPos > z then
 		while zDir ~= -1 do
 			turnLeft()
 		end
 		while zPos > z do
 			if turtle.forward() then
 				zPos = zPos - 1
 			elseif turtle.dig() or turtle.attack() then
 				collect()
 			else
 				sleep( 0.5 )
 			end
 		end
 	elseif zPos < z then
 		while zDir ~= 1 do
 			turnLeft()
 		end
 		while zPos < z do
 			if turtle.forward() then
 				zPos = zPos + 1
 			elseif turtle.dig() or turtle.attack() then
 				collect()
 			else
 				sleep( 0.5 )
 			end
 		end
 	end
 
 	while depth < y do
 		if turtle.down() then
 			depth = depth + 1
 		elseif turtle.digDown() or turtle.attackDown() then
 			collect()
 		else
 			sleep( 0.5 )
 		end
 	end
 
 	while zDir ~= zd or xDir ~= xd do
 		turnLeft()
 	end
 end
 
-	print( "Out of Fuel" )
+
 	rednet.send(38,"Out of fuel!")
 	return
 end
-print( "Excavating..." )
+
 	rednet.send(38,"Mining")
 
 local reseal = false
 turtle.select(1)
 if upordown == 0 then
 	if turtle.digDown() then
 	end
 elseif upordown == 1 then
 	if turtle.digUp() then
 	end
 end
 
 local alternate = 0
 local done = 0
 while done~=size2 do
 	for varx=1,size1 do
 		for varz=1,size3-1 do
 			if not tryForwards() then
 				done = size2
 				break
 			end
 		end
 		if done==size2 then
 			break
 		end
 		if varx<size1 then
 			if math.fmod(varx + alternate,2) == 0 then
 				turnLeft()
 				if not tryForwards() then
 					done = size2
 					break
 				end
 				turnLeft()
 			else
 				turnRight()
 				if not tryForwards() then
 					done = size2
 					break
 				end
 				turnRight()
 			end
 		end
 	end
 	if done==size2 then
 		break
 	end
 
 	if size1 > 1 then
 		goTo( 0,depth,0,0,1 )
 	end
 	if done ~= size2-1 then
 		if upordown == 0 then
 			if not tryDown() then
 				done = size2
 				break
 			end
 		elseif upordown == 1 then
 			if not tryUp() then
 				done = size2
 				break
 			end
 		end
 	end
 	done = done + 1
 end
-print( "Returning to surface..." )
+
 rednet.send(38,"Returning to surface")
 
 -- Return to where we started
 goTo( 0,0,0,0,-1 )
 unload()
 goTo( 0,0,0,0,1 )
 
 -- Seal the hole
 if reseal then
 	turtle.placeDown()
 end
 
 print( "Mined "..(collected + unloaded).." items total." )