StripMine

local tArgs = { ... }

branches = 4

function refuel( ammount )
	return true
end


local function tryUp()
	if not refuel() then
		print( "Not enough Fuel" )
	end

	while not turtle.up() do
		if turtle.detectUp() then
			if turtle.digUp() then
				if not collect() then
					print( "Up OK" )
				end
			else
				return false
			end
		elseif turtle.attack() then
			if not collect() then
			end
		else
			sleep( 0.5 )
		end
	end

	return true
end

local function tryForwards()
	if not refuel() then
		print( "Not enough Fuel" )
	end

	while not turtle.forward() do
		if turtle.detect() then
			if turtle.dig() then
				if not collect() then
				end
			else
				return false
			end
		elseif turtle.attack() then
			if not collect() then
			end
		else
			sleep( 0.5 )
		end
	end

	return true
end

local function digbranch()
	shell.run("digtunnel",tArgs[1])
	tryUp()
	shell.run("digtunnel",tArgs[1])
	while turtle.down() do
		sleep(0.1)
	end
end

while branches > 0 do
	digbranch()
	turtle.turnRight()
	tryForwards()
	tryForwards()
	tryForwards()
	turtle.turnLeft()
	branches = branches - 1
end