function farm (xLength, yLength)
	for x = 1, xLength, 1 do
		for y = 1, yLength, 1 do
			nineXNine(9,9)
			if y ~= yLength then
				goToNextJobY()
			end
		end
		if x ~= xLength then
			goToNextJobX(yLength)
		end
	end
	goHomeBig(xLength, yLength)
end

function goToNextJobX(yLength)
	turtle.turnRight()
	turtle.turnRight()
	goForward(((yLength-1)*10)-1)
	turtle.turnRight()
	goForward(10)
	turtle.turnLeft()
end

function goToNextJobY()
	goForward(10)
end

function goHomeBig(xLength, yLength)
	turtle.turnRight()
	turtle.turnRight()
	turtle.turnRight()
	turtle.turnRight()
end

function nineXNine(targetLength, targetWidth)

	for width = 1, targetWidth, 1 do
		processLine(targetLength)

		if width == targetWidth then
			goHome(targetLength, targetWidth)
		elseif width%2 == 1 then
			turnRight()
			nextMoveIsRight = false
		else
			turnLeft()
			nextMoveIsRight = true
		end
	end
end

function processLine(targetLength)
	doWork()
	for length = 1, targetLength-1, 1 do
		turtle.forward()
		doWork()
	end
end

function doWork()
	turtle.digDown()
	turtle.placeDown()
end

function turnRight()
	turtle.turnRight()
	turtle.forward()
	turtle.turnRight()
end

function turnLeft()
	turtle.turnLeft()
	turtle.forward()
	turtle.turnLeft()
end

function turnAround()
	turtle.turnLeft()
	turtle.turnLeft()
end

function goForward(lengthToGo)
	for lengthWent = 1, lengthToGo, 1 do
	turtle.forward()
	end
end

function goHome(targetLength, targetWidth)
	if(targetWidth%2 == 1) then
		turnAround()
		goForward(targetLength-1)
	end

	turtle.turnRight()
	goForward(targetWidth-1)
	turtle.turnRight()
end

nineXNine(9, 9)