-- Start
function nextLevel()
	turtle.digDown()
	turtle.down()
end

function steppedSection(amount)
	for i=1,amount do
		turtle.forward()
		turtle.turnLeft()
		turtle.dig()
		turtle.forward()
		turtle.turnRight()
		turtle.dig()
		if i == amount then
			turtle.turnLeft()
		end
	end
end

function oneLevel()
	for i=1,2 do
		-- First wall
		for i=1,9 do
			turtle.dig()
			turtle.forward()
		end

		-- First stepped
		steppedSection(4)

		-- Second Wall
		for i=1,8 do
			turtle.dig()
			turtle.forward()
		end

		-- Second stepped
		steppedSection(4)
	end
end

for i=1,10 do
	nextLevel()
	oneLevel()
	nextLevel()
	oneLevel()
end