Sleep Function

I have been having tourble with boht the sleep and usleep function. I can only get them to 40 sec and then they will cut off. This is even true with the micro seconds in the usleep function. Here is my code: do{ $hour = date("G"); $minute = date("i"); $sec = date("s"); print "$hour:$minute:$sec\n"; usleep(100); // or us sleep(1); }while($minute != "00"); This will stop on the 40th sec. Its not the 40th loop becuase usleep loops hundreds of times but only quite on the 40th second. I am trying to set up a program to run every hour and this loop finds the hour on the hour then continues to run.Incase someone starts the script say at 7:30. It will wait till 8:00 to run the rest of the script. If there is a better way to do this please tell!!!! Thanks, Josh Seward js389599@ohiou.edu