Hello world awesome widget (A timer)

CounterWiboxWidget.lua

-- this can be considerd as a hello world that does somthing example for awesome wibar widgets
-- you can modify this slightly to make some useful widgets (i.e. pomodoro widget)
local textbox = require("wibox.widget.textbox")
local timer = require("gears.timer")

local counter = 10

local w = textbox()

local function update_timer()
  w.text = "⌚: " .. counter
  if counter == 0 then
    timer:connect_signal("timer::stop")
  end
  counter = counter - 1
end

timer {
  timeout = 1, 
  call_now  = true,
  autostart = true,
  callback = update_timer
}

return w