setInterval function to refresh new Date?

Hello, I apologize if this question has already been posted...  I'm trying to make a basic time/date in Animate.  If I use this.tf.text = new Date();  where tf is a dynamic text field, the .fla displays what I want.  My question is, is it possible to put this in a function and then use setInterval to essentially get a real time display?  If so, can someone help with the code?  I'm a mechanic by trade and hitting it with a hammer isn't working....