local tArgs = { ... }
if #tArgs ~= 1 then
	print( "Usage: startStripmine <length>" )
	return
end

-- Mine in a quarry pattern until we hit something we can't dig
local length = tonumber( tArgs[1] )
if length < 1 then
	print( "Tunnel length must be positive" )
	return
end

local function digLayerTopDown()
	turtle.dig()
	turtle.digDown()
	turtle.down()
	turtle.dig()
	turtle.digDown()
	turtle.down()
	turtle.dig()
end

local function digLayerBottomUp()
	turtle.dig()
	turtle.digUp()
	turtle.up()
	turtle.dig()
	turtle.digUp()
	turtle.up()
	turtle.dig()
end

for i=1,length do
	turtle.turnRight()

	--First Layer
	digLayerBottomUp()

	--Transition to second layer
	turtle.turnLeft()
	turtle.dig()
	turtle.forward()
	turtle.turnRight()

	--Second Layer
	digLayerTopDown()

	turtle.turnLeft()
	turtle.dig()
	turtle.forward()
	turtle.turnRight()

	--Third Layer
	digLayerBottomUp()

	--Transition to second layer
	turtle.turnLeft()
	turtle.dig()
	turtle.forward()
	turtle.turnRight()

	--Final Layer
	digLayerTopDown()

	--Starter Holes
	turtle.forward()
	turtle.dig()
	turtle.up()
	turle.dig()
	turtle.turnRight()
	turtle.turnRight()
	turtle.forward()
	turle.dig()
	turtle.down()
	turle.dig()
	turtle.turnRight()
	turle.dig()
	turle.forward()
end