computerCraft quarry

y = 43
collum = 1
row = 1
inventory = 0
detect = false
fuel = turtle.getFuelLevel()
movesMod = 1
evenOdd

if fuel = 0 then
	turtle.select(1)
	turtle.refuel(1)
end

while y > 5 do
	while row < 17 do
		while collum < 17 do
			turtle.digUp()
			turtle.digDown()
			detect = turtle.detect()
			while detect == true do
				turtle.dig()
				detect = turtle.detect()
			end
			turtle.forward()

			collum = collum + 1
			movesMod = movesMod + 1

			turtle.select(16)
			inventory = turtle.getItemCount()
			if inventory >= 1 then
				turtle.select(2)
				i = 3
				turtle.placeUp()
				while i <= 15 do
					turtle.select(i)
					turtle.drop(64)
				end
			end
			fuel = turtle.getFuelLevel()
			if fuel == 0 then
				turtle.select(1)
				turtle.refuel(1)
			end
		end

		collum = 1
		evenOdd = movesMod % 2
		if evenOdd == 0 then
			turtle.turnLeft()
			detect = turtle.detect()
			while detect == true do
				turtle.dig()
				detect = turtle.detect()
			end
			turtle.forward()
			turtle.digUp()
			turtle.digDown()
			turtle.turnLeft()
		else
			turtle.turnRight()
			detect = turtle.detect()
			while detect == true do
				turtle.dig()
				detect = turtle.detect()
			end
			turtle.forward()
			turtle.digUp()
			turtle.digDown()
			turtle.turnRight()
		end

	end
	y = y - 1
	row = row - 1
end