Filling up an area afterwards

programming flash
1

Hi all

I want to fill up an area after you have drawn several things. For example I have tried to make one:


[FONT=Courier New]          ------------
          |          |
  --------|-----     |
  |       | x  |     |
  |       -----|------
  |            |
  |            |
  --------------[/FONT]

The 2 rectangle is created with 8 lines (emptymovieclips) in swf. Is it possible to fill up the area only with the x?

Thanks in advance