View difference between Paste ID: brPmemJF and ByUyWEig

 -- ByUyWEig
 -- rW1DX74j
 -- n50gd8aN
 
 --place turtle in center of hollow hill feature at block 63 (turtle makes 64), coords +- 256,256, facing east
---turtle will autofuel from slot 1
+--place a stack of fuel in slot 1, turtle will autofuel as it needs fuel
---turtle will return to surface after maxSize area has been cleared
+
 --turtle will return to surface (level 96) after maxSize area has been cleared
 
 
 local curX = 0
 local curY = 0
 
 local maxSize = 48
 
 local function reqFuel(amt)
 	while turtle.getFuelLevel() < amt do
 		if turtle.getItemCount(1) <= 1 then
 			print("out of fuel")
-	for slot = 1, 16 do
+
 		else
 			turtle.refuel(1)
 			sleep(1)
 		end
 	end
 end
 
 local function foundItem(chest)
 
 	print("Found a treasure chest!")
 
 	turtle.digDown()
 	for slot = 2, 16 do
 		if turtle.getItemCount(slot) > 0 then
 			turtle.select(slot)
 			turtle.dropDown()
 			sleep(0)
 		end
 	end
 	turtle.select(1)
 
 	local stacks = 0
 	while turtle.suck() do
 		stacks = stacks + 1
 		sleep(0)
 	end
 	turtle.select(16)
 	turtle.dig()
 
 	print("Looted " .. stacks .. " items.")
-	for slot = 1, 16 do
+
 	--return to surface
 	reqFuel(130)
 
 	for x = 1, 64 do
 		while not turtle.up() do
 			turtle.digUp()
 			sleep(0)
 		end
 	end
 
 	while not turtle.place() do
 		turtle.dig()
 		sleep(0)
 	end
 	for slot = 2, 16 do
 		if turtle.getItemCount(slot) > 0 then
 			turtle.select(slot)
 			turtle.drop()
 			sleep(0)
 		end
 	end
 	turtle.select(1)
 
 	--dig down and continue quarry
 	for x = 1, 64 do
 		while not turtle.down() do
 			turtle.digDown()
 			sleep(0)
 		end
 	end
 
 end
 
 local function digForward()
 
 	local chest
 
 	chest = peripheral.wrap("left")
 	if chest then
 		turtle.turnLeft()
 		foundItem(chest)
 		turtle.turnRight()
 	end
 	chest = peripheral.wrap("front")
 	if chest then
 		foundItem(chest)
 	end
 	chest = peripheral.wrap("right")
 	if chest then
-	--              [       initialization     ]   [     mainquarry            ]   [extra for two return trips]
+
-	local reqFuel = 32 + ((maxSize / 2 - 8) * 2) + (maxSize * maxSize * 0.33333) + (64 * 4)
+
 		turtle.turnLeft()
 	end
-	while turtle.getFuelLevel() < reqFuel do
+
-		if not turtle.refuel(1) then
+
-			print("Req Fuel: " .. reqFuel .. " Cur Fuel: " .. turtle.getFuelLevel())
+
 		sleep(0)
 		turtle.dig()
 	end
-	turtle.dropUp()
+
 end
-	while turtle.getItemCount(1) > 0 do
+
-		print("Remove Excess Fuel")
+
-		sleep(1)
+
 local function main()
 	turtle.select(1)
 
 --dig down and position to corner of quarry area
 
 	reqFuel(maxSize + 32)
 
 			for x = 1, 32 do
 				repeat turtle.digDown() sleep(0) until turtle.down()
 			end
 			turtle.turnLeft()
 			for x = 1, (maxSize / 2 - 8) do
 				turtle.digDown()
 				repeat turtle.dig() sleep(0) until turtle.forward()
 			end
 			turtle.turnLeft()
 			for x = 1, (maxSize / 2 - 8) do
 				turtle.digDown()
 				repeat turtle.dig() sleep(0) until turtle.forward()
 			end
 			turtle.turnLeft()
 
 --quarry out the level
 		curX = 0
 		curY = 0
 		while true do
 			reqFuel(10)
 
 			if(curY % 2 == 0) then
 				digForward()
 				curX = curX + 1
 
 				if(curX >= maxSize) then
 					turtle.turnLeft()
 					digForward()
 					digForward()
 					digForward()
 					turtle.turnLeft()
 					curY = curY + 3
 				end
 			else
 				digForward()
 				curX = curX - 1
 
 				if(curX <= 0) then
 					turtle.turnRight()
 					digForward()
 					digForward()
 					digForward()
 					curY = curY + 3
 					if(curY > maxSize) then
 						break
 					else
 						turtle.turnRight()
 					end
 				end
 			end
 		end
 
 --return to surface
 		reqFuel(64)
 			for x = 1, 64 do
 				repeat turtle.digUp() sleep(0) until turtle.up()
 			end
 
 end
 
 
 
 main()