Count down in min:sec and trigger some action when time reaches 0:0. If you have suitable hardware and a way to trigger it from REXX, you could actually have it switch off the stove when your eggs are ready!
Currently at version 1.01; updates are unlikely unless I get feedback!
File: EggTM101.ZIP
Requires: REXX, VROBJ
Installation: None.
Operation: See EggTimer.ABS in the ZIP.
De-installation: Delete.
Distribution: Emailware.