Good Movement

-- Require component
local function proxyFor(name, required)
  local address = component and component.list(name)()
  if not address and required then
    error("missing component '" .. name .. "'")
  end
  return address and component.proxy(address) or nil
end


--Require
local drone = proxyFor("drone", true)
local navigation = proxyFor("navigation", true)
local m = proxyFor("modem", true)



-- Old Coords
disX = -17
disY = -100
disZ = 0


-- Open Port
m.open(808)

--Initial Values
local port = 808
local startx, starty, startz = navigation.getPosition()

local function moveDirection(axis, worked, distance, start, port)

    -- IF WITHIN 1 BLOCK
    while (worked > distance + 1 or worked < distance - 1) do


      -- BROADCAST LOCATION
      m.broadcast(port, axis .. ": " ..  worked)

      -- UPDATE LOCATION
      x, y, z = navigation.getPosition()

      if axis == "x" then
          worked = x - start
      end

      if axis == "y" then
          worked = y - start
      end

      if axis == "z" then
          worked = z - start
      end

      -- FORWARD
      if worked < distance then

        if axis == "x" then
          drone.move(1,0,0)
        end

        if axis == "y" then
          drone.move(0,1,0)
        end

        if axis == "z" then
          drone.move(0,0,1)
        end

      end

      -- REVERSE
      if worked > distance then
        if axis == "x" then
          drone.move(-1,0,0)
        end

        if axis == "y" then
          drone.move(0,-1,0)
        end

        if axis == "z" then
          drone.move(0,0,-1)
        end
      end

    end

end

moveDirection("x", 0, 10, startx, 808)