Can objects that are using emphasis be used as triggers?

From: Sanjit Keskar (keskarsanjit_at_rediffmail.com)
Date: 01/17/05 

Date: 16 Jan 2005 22:14:15 -0800

If i have a blinking red circle object can i use it as a trigger (on
click) to make another object enter? Or does it depend on the (time)
accuracy of the click? Or does not happen at all