do "some action" once a minute

[Petr Jakes]

Thanks for your comment. It is mainly English issue (I am not native
English speaker).

OK, to be more specific, I would like to run the code, when the value
of seconds in the timestamp become say "00".
The whole code will run in the infinitive loop and other actions will
be executed as well, so it can not "sleep" for 60 seconds :).

Regards

Petr