error-handling.lua

coroutine.wrap(function ()
  local success, err = xpcall(function ()
    -- Do all your logic here that may throw an error
  end, debug.traceback)
  if not success then
    handleError(err)
  end
end)()

helper.lua

local function async(fn, callback)
  return coroutine.wrap(function ()
    callback(xpcall(fn, debug.traceback))
  end)()
end

-- Usage
async(function ()
  -- Do coroutine blocking code here
end, function (success, result)
  -- When it finishes, the result will be here.
end)

sleep.lua

-- setTimeout(ms, callback)

function sleep(ms)
  local thread = coroutine.running()
  setTimeout(ms, function ()
    coroutine.resume(thread);
  end)
  return coroutine.yield()
end