It's fun. And in case something happened to me, my friends would know where my location was at least 15 minutes before that thing happened to me. Just in case.

And it's fun

Thanks again MasterZap. Your explanation was very clarifying. I'll try to read the code and see if I can get what I want exactly (if my people stop bothering me ). In case of getting something useful and different I'll post it here (don't wait for me or maybe you will have to wait all your life).