-- BaseBuilding Turtle

-- Digs out rooms 16x16x4, with a staircase spiraling along the edges
-- Should always be started at the top-left corner of the area to dig...

-- No idea how I'm gonna get the stars to work, but the main part should be really easy

local startZ = 2
local startX = nil
local startY = nil


turtle.select(1)
turtle.refuel()
turtle.select(2)

while(true) do
	for spacing=1,2 do
		for z=1,4 do
			if startZ then z = startZ startZ = nil end
			for x=1,16 do -- Same, always already in the first one
				if startX then x = startX startX = nil end
				for y=1,16 do -- We're always inside the first one
					if startY then y = startY startY = nil end
					turtle.dig()
					turtle.suck()
					turtle.forward()
					if not turtle.detectDown() then turtle.placeDown() end -- Make sure the floors are filled in
				end
				-- Reached the end on this side, turn (right/left)...
				if x%2 == 1 then turtle.turnRight() else turtle.turnLeft() end
				turtle.dig()
				turtle.forward()
				if x%2 == 1 then turtle.turnRight() else turtle.turnLeft() end
				-- Ready to iterate again
			end
			-- We've cleared out a 16x16 area on this level.
			-- And we are currently outside of it, pointing back in
			-- This is our staircase down
			turtle.dig()
			turtle.forward()
			turtle.digUp()
			turtle.digDown()
			turtle.down()
			-- Figure out how to get back to our starting point.
			turtle.turnLeft()
			turtle.dig()
			turtle.forward()
			turtle.turnLeft()
			for temp=1,z do -- We will be [z] blocks from the edge on this side
				turtle.dig()
				turtle.forward()
			end
			turtle.turnRight()
			-- And a full 15 blocks from the next edge
			for temp=1,15 do
				turtle.dig()
				turtle.forward()

			end
			turtle.turnRight() -- And it's ready to iterate again
		end
		-- We have successfully dug 16x16x4
		-- And are again on our stairwell area, on the 5th block into the stairwell
		-- Continue the stairwell down to 8
		for temp=5,8 do -- This works for both halves
			turtle.dig()
			turtle.forward()
			turtle.digUp()
			turtle.digDown()
			turtle.down()
		end
		-- Get back to the starting position
		turtle.turnLeft()
		turtle.dig()
		turtle.forward()
		turtle.turnLeft()
		-- We are on block 8 and want to be on block 1
		for temp=8,1,-1 do
			turtle.dig()
			turtle.forward()
		end
		turtle.turnRight()
		-- And we're ready to iterate again
	end
end