http://www.theopensourcerer.com/2010/02/09/indicator-applet-libnotify-support-for-thunderbird/
“0ddn1x: tricks with *nix | a minimalist’s medley” is published under Creative Commons Attribution – NonCommercial 4.0 International (CC BY-NC 4.0) licensing.
As long as you credit this blog as the source, you may do anything you wish with 0ddn1x’s content except redistribute it for profit.
“0ddn1x: tricks with *nix” is published solely on odd-numbered weeks, viz…
0ddn1x() { echo $(expr $(date -u +%U) % 2) }