Ok… you see my example above?? same general situation.
I would definitely do the grid in flash. Choose “view/grid/view grid”, and “view/grid/snap to grid”.
Now, using your line tool, draw lines along the grid you see. The line tool should “snap” to the grid vertecies so they will come out straight. once you have your whole stage covered in the grid, select all of those lines. hit “ctrl-G” to group them all together. Select “Insert/convert to symbol” and choose “graphic” from among the options.
now delete this graphic.
Now do the stuff in the above post to create a moving gradient square as I described.
Select the layer where the moving gradient square is located and add a layer. In this new layer, above the moving gradient’s layer, double clic on the square symbol to the left of the layer name. Choose, “mask” from among the options.
Now, select the layer below… the gradient square layer, and double click on it’s square symbol. Choose “maskED” for this layer. You will see it become indented under the mask layer above it.
Create a new layer. Click on it and drag it down below the moving gradient square layer. If it doesn’t automaticaly become a masked layer, double click on it’s square to make it one also.
In this layer, drag an instance of the grid symbol you created from your library to the main stage then center it.
In the “mask” layer, create a large sqare fill the size of the whole stage and centered.
The effect here is that the grid will fade in, while anything on the layers below it will always be seen.
If you would like me to put together an example of this. Please post your E-mail here. It would only take a couple minutes in the morning. I could have it in your mail box at 8 AM or so.