Triggering events

Hi my most excellent Squeak colleagues,

 

I am trying out Squak for English as Second language.  So far it is excellent!

 

I am however at a loss as to how one can trigger events using time,  ie something happens in two or more seconds.  I would for instance like text to flash for a few seconds then disappear.  The intial trigger is the correct answer.

 

How do I do this?

 

Regards,

Mike Cummins