Mine

local args = {...}
length = args[1]

function dig()
		while turtle.detect() do
			turtle.dig()
			os.sleep(0.5)
		end
end
function digUp()
		while turtle.detectUp() do
			turtle.digUp()
			os.sleep(0.5)
		end
end
function forward()
	while turtle.forward()==false do
		os.sleep(1)
		dig()
	end
end
for x=1,length,1 do
	dig()
	forward()
	turtle.digDown()
	turtle.down()
	turtle.turnRight()

	turtle.digDown()
	for z=1,4,1 do
		dig()
		forward()
		digUp()
		turtle.digDown()
	end
	turtle.turnLeft()
	turtle.turnLeft()
	turtle.down()
	turtle.digDown()
	turtle.down()
	turtle.digDown()
	turtle.down()
	turtle.digDown()
	for r=1,4,1 do
		dig()
		forward()
		digUp()
		turtle.digDown()
	end
	turtle.up()
	turtle.up()
	turtle.up()
	turtle.turnRight()
end