local function ensure_equipped(ptype, item)
	local cur = peripheral.getType"left"
	print(cur)
	if cur == ptype then return true end
	for i = 1,16 do
		local det = turtle.getItemDetail(i)
		if det and det.name == item then
			turtle.select(i)
			return turtle.equipLeft()
		end
	end
	return false, "couldn't find "..item
end

local function ensure_modem() return ensure_equipped("modem","computercraft:wireless_modem_normal") end
local function ensure_scanner() return error("aaa") end

assert(ensure_modem())

local x,y,z = gps.locate()
print(x,y,z)
local v = vector.new(x,y,z)
print(v)
local w = vector.new(gps.locate())
print(w)