[Newbies] #Schedule - How to Use?

I am working on an application which requires task scheduler like cron on UNIX or Task Manager on Windows. In the swiki , there is a page about Refactored Date and Time Classes http://wiki.squeak.org/squeak/1871 which mentions #Schedule in the context of TV programs. I have figured out how to set up, but I can not figure out how to use it productively.

My simple use case is: a. create an instance of #Schedule b. Use the schedule to write a string to the Transcript based on the contents of the schedule.

|sampleSchedule rightNow cr |

rightNow := DateAndTime now. cr := String cr.

sampleSchedule := Schedule starting: rightNow ending: rightNow + 20 minutes .

sampleSchedule schedule: {Duration minutes: 1. Duration minutes: 3}. sampleSchedule scheduleDo:[:each |Transcript show: each asString, String cr].

...

This results in all of the schedule items being written to the

Transcript immediately, rather at the schedule time for each.

How to I use a schedule to run a block at the time specified by the schedule.

I have looked at #Delay, but it has a limit of ~six days which will not work for me.

Thanks,

-jrm