WIP Mining Turtle

function mine(pos)
	if turtle.getItemCount(16) then
		for a = 0, 15 do
			turtle.select(16 - a)
			if turtle.compare() and turtle.getItemCount(16 - a) 64 then
				empty()
			end
		end
	end
	repeat
		turtle.dig()
		turtle.attack()
	until turtle.forward()
	gps()
end

function up(pos)
if turtle.getItemCount(16) then
		for a = 0, 15 do
			turtle.select(16 - a)
			if turtle.compareUp() and turtle.getItemCount(16 - a) 64 then
				empty()
			end
		end
	end
	repeat
		turtle.digUp()
		turtle.attackUp()
	until turtle.up()
	gps()
end

function down(pos)
if turtle.getItemCount(16) then
		for a = 0, 15 do
			turtle.select(16 - a)
			if turtle.compareDown() and turtle.getItemCount(16 - a) 64 then
				empty()
			end
		end
	end
	repeat
		turtle.digDown()
		turtle.attackDown()
	until turtle.up()
	gps()
end

function gps()
	if pos == "x+" then
		x = x + 1
	elseif pos == "x-" then
		x = x - 1
	elseif pos == "y+" then
		y = y + 1
	elseif pos == "y-" then
		y = y - 1
	elseif pos == "z+" then
		z = z + 1
	elseif pos == "z-" then
		z = z - 1
	end
end

local x = 0
local y = 0
local z = 0

while true do
	while turtle.getFuelLevel() > 1 do