Automatically Copy Rows To Different Sheet Based On Value

I have several rows worth of tasks with several columns associated with each one of them. In other words, each task will have some event, comment, date etc. and a flag at the end if it's complete or not. Below is a very simplified idea.

A
B
C
D

1
Event
Date
Done

2
Party
12/10/2013
Yes

3
Marathon
12/20/2013
Yes

4
Graduation
01/15/2013
No

Formulas that I have used so far have accomplished everything I need except one thing. I would like to copy rows to a different sheet (tab) based on the flag condition i.e. if the string says "Yes" (in this example), I would like to copy that row to a different sheet and do that for each row. In the example above, rows 2 and 3 would be copied to a different sheet creating a list/summary of complete events. As that is copied, I would use that information again on that new sheet to do more things.