miner-refill

refill = function()
	turtle.select(1)
	if turtle.getFuelLevel()  < 50 then
		repeat
			sleep()
			destroy()
			turtle.placeUp()
			turtle.suckUp()
			turtle.refuel(64)
			turtle.dropUp()
			turtle.digUp()
		until turtle.getFuelLevel() > 50
	end
end

destroy = function()
	turtle.digDown()
	turtle.digUp()
	while turtle.detect() == true do
		turtle.dig()
	end
end
lastdestroy = function()
	turtle.digUp()
	turtle.digDown()
end
row = function(distance)
	for i = 0, distance, 1
	do
		destroy()
		refill()
		turtle.forward()
	end
end
righthook = function()
	turtle.turnRight()
	destroy()
	refill()
	turtle.forward()
	turtle.turnRight()
end
lefthook = function()
	turtle.turnLeft()
	destroy()
	refill()
	turtle.forward()
	turtle.turnLeft()
end
square = function(Length, Depth)
	if Length % 2 == 0 then
		for i = 1, Length, 2
		do
			row(Depth)
			righthook()
			row(Depth)
			lefthook()
		end
		row(Depth)
		righthook()
		row(Depth)
		lastdestroy()
		turtle.turnRight()
		for i = 0, Length, 1
		do
			refill()
			turtle.forward()
		end
		turtle.turnRight()
	elseif Length % 2 ~= 0 then
		for i = 0, Length, 2
		do
			row(Depth)
			righthook()
			row(Depth)
			lefthook()
		end
		row(Depth)
		lastdestroy()
		turtle.turnLeft()
		turtle.turnLeft()
		for i = 0, Depth, 1
		do
			refill()
			turtle.forward()
		end
		turtle.turnRight()
		for i = 0, Length, 1
		do
			refill()
			turtle.forward()
		end
		turtle.turnRight()
	elseif Length == 0 then
		row(Depth)
		turtle.turnLeft()
		turtle.turnLeft()
		for i = 0, Depth, 1
		do
			refill()
			turtle.forward()
		end
		turtle.turnRight()
		turtle.turnRight()
	elseif Depth == 0 then
		turtle.turnRight()
		row(Length)
		turtle.turnLeft()
		turtle.turnLeft()
		for i = 0, Length, 1
		do
			refill()
			turtle.forward()
		end
		turtle.turnRight()
	end
end

term.write("Select Depth: ")
local depth = read()
depth = depth - 2
term.write("Select Length: ")
local length = read()
length = length - 2

refill()
square(length, depth)
print("Mining Completed")