local w = 0
--function
function MineDown()
	for z = 1, y do
		while not turtle.down() do
			turtle.dig()
			turtle.attack()
		end
		FullStorage()
		RefuelDigger()
		for t = 1, 4 do
			turtle.select(t)
			if not turtle.compare() then
				turtle.dig()
			end
			turtle.turnRight()
		end
	end
end

function RefuelDigger()
	if turtle.getFuelLevel() < 30 then
		if turtle.getItemCount(16) == 1 then
			turtle.select(16)
			turtle.refuel(1)
			turtle.select(15)
			if turtle.placeUp()then
				turtle.select(16)
				turtle.suckUp()
				turtle.select(15)
				turtle.digUp()
			end
		else
			turtle.select(16)
			turtle.refuel(1)
		end
	end
end

function FullStorage()
	if turtle.getItemCount(13) > 0 then
		turtle.select(14)
		if turtle.placeUp() then
			for i = 5, 13 do
				turtle.select(i)
				turtle.dropUp()
			end
			turtle.select(14)
			turtle.digUp()
		end
	end
end


--program

for i=1,25*25 do
w=w+1
	if w%5 == 0 then
	MineDown()
	else
		while not turtle.forward() do
			turtle.attack()
			turtle.dig()
		end
	end
	if i%25 == 0 then
		print()
		w=w+1
	end
end