Hiding Showing Drawing on movie clip

I have a movie clip that has an image on it.

I want to dynically open this movie clip and move it to a specific location (x,y) on the main timeline on top of everything else.

Then I want to draw lines on that new movie clip that display on top of the image on that movie clip.

I have an idea on how to draw the lines, (well at least I think I do)


_root.audiogram.lineStyle(2, 0xFF0000, 100); 
_root.audiogram.moveTo(0, 0);
_root.audiogram.lineTo(200, 150);
_root.audiogram.lineTo(100, 50);

I also need to be able to clear the lines that are drawn.

Any help would be greatly appreciated.